This was a ton of fun and there's so much potential with this concept! I really enjoyed mastering the formless and circle shape physics to get through the level. Trying to find out how they worked best, like for jumping and momentum, kept me engaged until the end.
I wasn't sure how the triangle was intended to "help" me get through the level once I got to it, but I had fun with it's mechanic nonetheless.
A couple of bug notes, whenever you respawn at the start sometimes the camera is panned down more than when the game starts. This isn't game-breaking, the character is still plenty visible and it corrects itself by the first ramp. Additionally, not sure if this was intended, but the triangle only seems to launch when it is on a certain side (I assume the one on the ground when it first loads in)
Great job and congratulations on your first game!