Loved the game! Did all levels multiple times trying to improve my score. It's rare.
- It could be cool in game to see your previous best score to try to beat yourself. Same thing once the level is complete in the result panel.
- Avoid going offscreen can be great too. Maybe just by avoid to select the to edgy cells?
- You can easily add more levels I think by be focus on specific thematics and limitation. Actually the less interesting piece was the full random one.
- Maybe an endless option too ? Until all the screen space is complete;