I do not how you did this in only four days! This is amazing.
The music is pleasant, the SFX just fits perfectly.
The art whole pixel art is beautiful! I wish my art was this awesome.
The look of it with the atmosphere reminds me a bit of the Crystal Hollows in Hollow Knight...
The game runs totally bug free (at least in my play through) and I am amazed how many mechanics you were able to put into this, although I would have loved to experience each individually with a bit more detail...