So a few things...(since post-jam release is planned).
One is that I did not quite understand how to progress (or what is progress). Two is that the control is a bit surprising as when I see a player I just assume WASD is moving and jumping. This is a relatively minor point tho, because I got familiar with this fairly fast. The third point is a bug I think, after I merged three blobs together and unplugged (not sure what this means), I got a sort of big gray area with no character nor any enemies so I was stuck.
Liked the sprite artwork in both modes, I think it has great potential.
In conclusion, I think a bit more refinement including tutorial and mechanics explanation and some debugging is required.