I built the greatest level, then accidentally hit quit, which immediately closed everything, please press F to pay respects.

I also had the camera movement bug, until I played my first level, I couldn't move the camera. Otherwise I think it's a neat gameplay concept. I think it might need a bit of a "hook" to motivate people to keep playing, else it might run into the trap a lot of games banking on the player's creativity fall in and get boring fast after the initial burst of creativity runs out. Though I guess it's alpha 0.0.0.0, so I'm sure you still have a lot of things planned already.

Aw man, I download these things to play games, not be prompted to make one and remember I have one I need to hurry up on!

I was never any good with these sorts of 'make your own puzzles' type games, so I'm too much of a brainlet to extensively play around with it. Slime physics are neat, though simplified compared to something like Gish, which might limit weird non-Newtonian puzzle possibilities.

I also ran into a bug where I couldn't move the editor around until I cleared a level. Zooming the map out (if it isn't possible already, might be related to the former bug) would also be nice.

Also, putting a big price tag on this thing at such an early state's not a good look. Take that shit to Patreon, you'll get more traffic that way anyway.