I played the fixed version for quite a while now and got through the first level. I am assuming the other level buttons in the main menu are just for later ;)

First of all, I liked the game a lot and came back until I cracked the level, but I want to give some remarks on some bugs or inconveniences I noticed while playing:

- I don't know if it's intentional, but I really missed some checkpoints. Some of the next points wouldn't have been so frustrating if I had the option to just jump back in the problem without redoing the whole thing.

- sometimes I clipped into the ground or pipes, especially when going really fast (for example dropping in the cave). But also that one pipe after you get the pen

- Once I got used to the pen it got really fun to use, but figuring it out took me a couple of tries. Doing the whole part before that became a bit tedious (checkpoints :D)

- The levers where a bit tricky to use, but it was nice that no extra input was needed for them. Having to go back to search for extra levers was also pretty cool. One of the puzzles you can cheat by standing on the lever, but that just made it more fun for me.

A few things I really enjoyed while playing the game:

- The ladders felt really nice to use. Just swooshing up and keeping some of that momentum felt really good.

- The simple Texts in the level made it a lot more interesting and gave me some goal to push to the next Textbox

- the character felt pretty good to control and having the speed drawing elements gave that edge over a normal 2d platformer in my opinion

Overall I had a lot of fun playing, maybe you add some checkpoints, fix some of the bugs and then fill out that level select screen ;)