There is a bug where the screen goes black after you beat the game. I played through the game several times but couldn't get this bug to occur. I'll try to fix it after the jam ends just in case fixing it now gets me disqualified. If you're curious to see the ending, here's a video of the full gameplay.
End: 3:40
I would really appreciate if anyone would share more details about when the bug happens. Sorry about this and thanks for playing!
Edit:
A new version is available that fixes the game-breaking bugs and has other improvements based on your feedback.