Fun idea!
Some improvements to consider:
* As the guy who plays years on PC - I have spent a lot of time trying to click E, then F, then all letters before I finally read it is "1". While it is a kind of thematic - it is unintuitive for people used to play on pc with E/F default buttons to interact
* Tutorial would help as well so people see right in the game what they should do. Maybe the first level could be with the text on the screen and arrows showing and saying how to play
But overall that was cute experience!