Level 1 was good but a little long. If there were more obstacles or puzzles it would be more fun. Maybe add a few short walls to jump over.
Level 2 - adding a texture or pattern on the player ball would give you a better sense of movement rather than a green dot on the screen. It's not immediately obvious that the mouse can control the camera and since the camera starts low it feels very hard to reach the platforms. Without spamming the jump ability falling off of the platforms is very punishing.