diff --git a/cmd/tins2020/res/images/game_control_hover.png b/cmd/tins2020/res/images/game_control_hover.png
new file mode 100644
index 0000000..f6ee4b2
Binary files /dev/null and b/cmd/tins2020/res/images/game_control_hover.png differ
diff --git a/cmd/tins2020/res/images/hover.png b/cmd/tins2020/res/images/tile_hover.png
similarity index 100%
rename from cmd/tins2020/res/images/hover.png
rename to cmd/tins2020/res/images/tile_hover.png
diff --git a/cmd/tins2020/res/textures.txt b/cmd/tins2020/res/textures.txt
index 70fff51..befdadc 100644
--- a/cmd/tins2020/res/textures.txt
+++ b/cmd/tins2020/res/textures.txt
@@ -1,8 +1,9 @@
+game-control-hover: images/game_control_hover.png
 
 tile-dirt: images/tile_dirt.png
 tile-grass: images/tile_grass.png
 tile-snow: images/tile_snow.png
-hover: images/hover.png
+tile-hover: images/tile_hover.png
 
 cactus-small-1: images/cactus_short_NE.png
 cactus-small-2: images/cactus_short_NW.png
diff --git a/cmd/tins2020/tins2020.go b/cmd/tins2020/tins2020.go
index ea3fbff..0767cd2 100644
--- a/cmd/tins2020/tins2020.go
+++ b/cmd/tins2020/tins2020.go
@@ -92,6 +92,8 @@ func run() error {
 	app := tins2020.NewContainer()
 	overlays := tins2020.NewContainer()
 	overlays.AddChild(&tins2020.FPS{})
+	gameControls := tins2020.NewGameControls()
+	overlays.AddChild(gameControls)
 	content := tins2020.NewContainer()
 	app.AddChild(content)
 	app.AddChild(overlays)
diff --git a/flower.go b/flower.go
index a26325c..9baa89b 100644
--- a/flower.go
+++ b/flower.go
@@ -34,8 +34,8 @@ type FlowerResistance struct {
 // NewPoppyTraits creates the traits of a poppy, a very generic flower that thrives in a moderate climate.
 func NewPoppyTraits() FlowerTraits {
 	return FlowerTraits{
-		Spread: 0.01,
-		Life:   0.9991,
+		Spread: 0.0007,
+		Life:   0.99991,
 		Resistance: FlowerResistance{
 			Cold: 0.3,
 			Hot:  0.3,
diff --git a/gamecontrols.go b/gamecontrols.go
new file mode 100644
index 0000000..31abc65
--- /dev/null
+++ b/gamecontrols.go
@@ -0,0 +1,110 @@
+package tins2020
+
+import (
+	"log"
+
+	"github.com/veandco/go-sdl2/sdl"
+)
+
+type GameControls struct {
+	ControlBase
+
+	menu    ButtonBar
+	flowers ButtonBar
+}
+
+type ButtonBar struct {
+	Top     int32
+	Left    int32
+	Bottom  int32
+	Hover   int
+	Buttons []Button
+}
+
+type Button struct {
+	Icon     string
+	Disabled string
+
+	IsDisabled bool
+}
+
+const buttonBarWidth = 96
+
+func (b *ButtonBar) Handle(ctx *Context, event sdl.Event) {
+	switch e := event.(type) {
+	case *sdl.MouseMotionEvent:
+		if e.X > b.Left && e.X < b.Left+buttonBarWidth {
+			button := int(e.Y-b.Top) / buttonBarWidth
+			if button < 0 || button >= len(b.Buttons) || b.Buttons[button].IsDisabled {
+				button = -1
+			}
+			b.Hover = button
+		}
+	}
+}
+
+func (b *ButtonBar) Render(ctx *Context) {
+	ctx.Renderer.FillRect(&sdl.Rect{X: b.Left, Y: b.Top, W: b.Left + buttonBarWidth, H: b.Bottom})
+	texture := func(b Button) *Texture {
+		if b.IsDisabled {
+			texture := ctx.Textures.Texture(b.Disabled)
+			if texture != nil {
+				return texture
+			}
+		}
+		return ctx.Textures.Texture(b.Icon)
+	}
+	hoverTexture := ctx.Textures.Texture("game-control-hover")
+	for i, button := range b.Buttons {
+		pos := Pt(b.Left, b.Top+int32(i)*buttonBarWidth)
+		texture := texture(button)
+		texture.Copy(ctx.Renderer, &sdl.Rect{X: pos.X, Y: pos.Y, W: buttonBarWidth, H: buttonBarWidth})
+		if b.Hover == i {
+			hoverTexture.Copy(ctx.Renderer, hoverTexture.RectOffset(pos))
+		}
+	}
+}
+
+func NewGameControls() *GameControls {
+	return &GameControls{}
+}
+
+func (c *GameControls) Init(ctx *Context) error {
+	c.flowers.Buttons = []Button{
+		Button{Icon: "flower-poppy-1", Disabled: "flower-red-c-1"},
+		Button{Icon: "flower-poppy-1", Disabled: "flower-red-c-1", IsDisabled: true},
+	}
+	return c.updateBarPositions(ctx)
+}
+
+func (c *GameControls) Handle(ctx *Context, event sdl.Event) {
+	c.menu.Handle(ctx, event)
+	c.flowers.Handle(ctx, event)
+
+	switch e := event.(type) {
+	case *sdl.WindowEvent:
+		switch e.Event {
+		case sdl.WINDOWEVENT_RESIZED:
+			err := c.updateBarPositions(ctx)
+			if err != nil {
+				log.Fatal(err)
+			}
+		}
+	}
+}
+
+func (c *GameControls) Render(ctx *Context) {
+	ctx.Renderer.SetDrawColor(74, 198, 154, 255)
+	c.menu.Render(ctx)
+	c.flowers.Render(ctx)
+}
+
+func (c *GameControls) updateBarPositions(ctx *Context) error {
+	w, h, err := ctx.Renderer.GetOutputSize()
+	if err != nil {
+		return err
+	}
+	c.menu.Top, c.menu.Left, c.menu.Bottom = 0, 0, h
+	c.flowers.Top, c.flowers.Left, c.flowers.Bottom = 0, w-buttonBarWidth, h
+	return nil
+}
diff --git a/math.go b/math.go
index 4f221eb..b599c3c 100644
--- a/math.go
+++ b/math.go
@@ -34,4 +34,6 @@ func Min32(a, b float32) float32 {
 	return b
 }
 
+func Round32(x float32) float32 { return float32(math.Round(float64(x))) }
+
 func Sqrt32(x float32) float32 { return float32(math.Sqrt(float64(x))) }
diff --git a/projection.go b/projection.go
index a7cbc81..dd4cb2d 100644
--- a/projection.go
+++ b/projection.go
@@ -64,7 +64,7 @@ func (p *projection) update(renderer *sdl.Renderer) {
 		log.Fatal(err)
 	}
 	p.windowCenter = Pt(windowW/2, windowH/2)
-	p.windowRect = sdl.Rect{X: 0, Y: 0, W: windowW - 0, H: windowH - 0}
+	p.windowRect = sdl.Rect{X: buttonBarWidth, Y: 0, W: windowW - 2*buttonBarWidth, H: windowH - 0}
 }
 
 func (p *projection) visibleTiles(action func(int32, int32, Point)) {
diff --git a/terrainrenderer.go b/terrainrenderer.go
index 84c0b90..4e7e00d 100644
--- a/terrainrenderer.go
+++ b/terrainrenderer.go
@@ -4,12 +4,11 @@ import (
 	"fmt"
 
 	"github.com/veandco/go-sdl2/sdl"
-	"opslag.de/schobers/geom"
 )
 
 type terrainRenderer struct {
 	terrain *Map
-	hover   PointF
+	hover   *Point
 	project projection
 
 	interact interaction
@@ -42,7 +41,12 @@ func (r *terrainRenderer) Handle(ctx *Context, event sdl.Event) {
 			}
 		}
 	case *sdl.MouseMotionEvent:
-		r.hover = r.project.screenToMap(e.X, e.Y)
+		if insideRect(e.X, e.Y, &r.project.windowRect) {
+			hover := r.project.screenToMap(e.X, e.Y)
+			r.hover = &Point{X: int32(Round32(hover.X)), Y: int32(Round32(hover.Y))}
+		} else {
+			r.hover = nil
+		}
 		if r.interact.mouseDrag != nil {
 			r.project.center = r.project.center.Sub(r.project.screenToMapRel(e.X-r.interact.mouseDrag.X, e.Y-r.interact.mouseDrag.Y))
 			r.project.update(ctx.Renderer)
@@ -63,8 +67,13 @@ func (r *terrainRenderer) Handle(ctx *Context, event sdl.Event) {
 	}
 }
 
+func insideRect(x, y int32, rect *sdl.Rect) bool {
+	return x >= rect.X && x < rect.X+rect.W && y >= rect.Y && y < rect.Y+rect.H
+}
+
+func insideRectPt(p Point, rect *sdl.Rect) bool { return insideRect(p.X, p.Y, rect) }
+
 func (r *terrainRenderer) Render(ctx *Context) {
-	hover := Pt(int32(geom.Round32(r.hover.X)), int32(geom.Round32(r.hover.Y)))
 	toTileTexture := func(x, y int32) *Texture {
 		temp := r.terrain.Temp.Value(x, y)
 		if temp < .35 {
@@ -148,8 +157,8 @@ func (r *terrainRenderer) Render(ctx *Context) {
 		rect := r.project.screenToTileRect(pos)
 		text.Copy(ctx.Renderer, rect)
 
-		if x == hover.X && y == hover.Y {
-			ctx.Textures.Texture("hover").Copy(ctx.Renderer, rect)
+		if r.hover != nil && x == r.hover.X && y == r.hover.Y {
+			ctx.Textures.Texture("tile-hover").Copy(ctx.Renderer, rect)
 		}
 	})