Hi Jazzed_Iceberg,
First thanks for playing the game and give us feedback.
It's great that you enjoy the sections in the game. We really try to came up with a lot of fun ideas to challenge the player even more with each step.
And we agree with you that a checkpoint system would be great for some parts of the level. It was something we try to implement but time and lack of knowledge end up in leaving the mechanic for the next update of the game.
We take also your feedback about the controls and it's something that we are also gone to change in an upcoming update.
Again, thanks for playing our game. And we already share our feedback about "It's a buggy game".