This concept definitely fits the theme. Controls and everything worked well, the level selector was especially good! It really looks like I'm picking between paintings in a gallery. I like the level designs. You incorporated some obstacles that required me to think and learn about the character / physics, and I didn't get locked in anywhere.
The "green lumps good, grey lumps bad" was a funny surprise at first but you used it consistently through the levels, so I didn't feel confused as a player. Given how simple the graphics were, it communicated information to the player remarkably well! And I think the simple graphics fit the "blobs of paint" style!
I'm pretty sure I enjoyed this to the end... I beat level 3 and then my display permanently lost signal... 'XD. Not sure if that was a coincidence or not.
Well done!