I am using keyboard, not sure if you have game controller support. For me it was mostly wall jumping, it felt very difficult to control and just became frustrating. Seems gravity might be a bit much. I think if you put levels of difficulty and just adjust time and speed of game it would likely fix a lot of the issues. I would likely need to try with a game controller, it could be possible I am just not use to these types of games using keyboard (I usually only play platformers on game consoles, so very possible). Also it seems like the player gets stuck when running on tiles, maybe some issue with collision.