As promised I will reply with more.
1) With the buttons. Some said that those are hard to find and that the game should tell you to look for them for example in the first level but others think that everything is how it should be. A solution would be to make a how-to-play tab in the main menu where it is explained what the player should do.
2) Audio. Death audio for me is okay but I will look into it. It's more meant to work with the teleportation, so it makes sense when you chance levels, but I will look into it and see what can be done.
3) Movement. I know the problems with the movement. For this game, I will change it a little bit but for future projects, I will make it more better and enjoyable. One problem atm is when you jump from the platform. I plan to add about a 0.25 - 0.5 second delay when you jump off the platform. ATM as soon as you jump off does not let you jump (annoying) but with the delay, it should be more enjoyable. I came to this idea after the jam so I could not change it.
4) Z-fighting. I know it and knew it before the jam but I could not get it to work in the time I wanted so I just left it there. I did mess up a bit with the pro builder and map building on that level so that is probably the reason for it. ATM we can call it and feature - not a bug.
At the end:
Thank you for you're time and effort. I appreciate it. You did a very great job reviewing my game. Thank you again!