5 stars across the board. Incredibly ambitious and sticks the landing, on jam time constraints no less. This game would've been an achievement even if it had been developed as its own thing.
I thought I saw a lot of cave story visual references (the cris crosses and those ghost type enemies, mostly), happy to see my suspicions confirmed in the credits :p
If I could offer a bit of constructive criticism for future dev on the project, there's some things mechanically speaking that feel a bit superfluous, particularly some enemies like the squid feel easily ignorable and not much of a threat, and the levels felt a bit diluted at times. Of course polish is what suffers most under time constraints, but you have a really solid core here that could sing even more if the levels were a bit shorter and sweeter.
Followed your account, can't wait to see what you do next.