The hand-drawn art is beautiful.
The attack range felt a bit too short. I often had to get very close to enemies, which was especially risky against the flying eye that shoots lasers.
I also found a minor bug: the boss stayed frozen in place forever when I approached it from behind.
Speaking of the boss, I really liked its introduction. The scream at the start of the fight reminded me a lot of the bosses in Hollow Knight. Really cool.
This game has a lot of great ideas. It's impressive that it was made in just one week. :)