- [X] Increase difficulty.
- [ ] Add music & sounds.
- [ ] Keep score/difficulty level (resume & restart).
- [ ] Explain controls on info page.
- [ ] Fix usage of go/embed (and remove rice again).
- [X] Add monster animations (~~jumping on tile &~~ towards new tile).
- [ ] Scale icons (heart & star on right side) when playing.
- [ ] Change layout when playing in portrait mode.
- [X] Fix wobble animation.
- [ ] Add more unit tests?
- [ ] Fix z-fighting of monsters.