Really enjoyed your project. Awesome work!
Progression: creating multiple 'levels' to introduce concepts would be welcome. If I don't read the tutorial, It's hard to get started. At the same time, the tutorial is better understood after having played a game and failing. Not sure I would have understood properly the tutorial if I would have read it prior to starting the game.
UX comment: Event button looks like an information label, which doesn't provide the player the sense that it's a clickable area. Tutorial easily covers this, but I would put a bit of effort to clarify what can be clicked and what can't.