The best I've done so far is dying in 2-1 with 29525 points.
The game is excellent, I love it. It both 100% feels like a NES game and is very unique due to be based on this weird physics including bouncing on the walls, which is quite fun to apprehend and get better at using it. The sequences are different with the appropriate difficulty and the length of the levels is perfect too, it's not impossible yet quite satisfying to beat one more level.