Thanks for the feedback!
The path-finding problem actually exists for both close-range and long range mushrooms, they both use the same algorithm, but the long-range ones stop heading towards you when they get close enough :P . But yeah, they the path-finding is very simple and there's a lot of room for improvements.
And for the IJKL keys - I had a gamepad with me and tested the game primarily on it. I wanted to ask someone to playtest it on keyboard, but in the end I didn't ask anyone because there were a lot of bugs with the border when restarting a level and I was running out of time.
But I'm glad you liked the visuals and the overall style :3 .