This was a very nice, relaxing game with cute visuals. I music was particularly nice, and I liked watching the blobs bounce around :)
The visual design is quite nice. However, it was a little small and hard for me to see. When I entered fullscreen mode, I noticed most of the edges around the walls and coins looked awkwardly jagged, and there were some green pixels along the bottom of the wall texture. Making the background a darker color would be easier on the eyes.
I was unsure how the jam's theme came into play until I read the game's description. Maybe a simple UI showing the coins collected and coins needed could be added. This also might be bugged, as I still had to collect all the coins to win even after dying several times.
Using the mouse to control felt good and added to the relaxation I felt playing the game. Nice job!