Thanks for the comment Magicsofa! I had actually forgot that I added keyboard input in the game as it was just used for testing :P
I did cater the game to be played with a controller for better precision but I will probably go back and add proper keyboard input to the game. As for the save-points, initially when creating the game I had check points at the start of every room, so that when you die it would not be a significant deal, like Celeste. But then the check points had a huge bug that I discovered after I was close to finishing the game and since this was my first game I honestly did not know what to do, so I chucked the check points making it much harder definitely. For the level selection, levels 2 and 3 are disabled. Once you beat level 1, level 2 can be played, and once level 2 is beat you can play level 3.
I apologize for the many imperfections of the game, but I do thank you for your feedback! This comment means a lot to me, thank you!