I managed to complete your game. Since this is the first game you made, it is actually not that bad. I did enjoy some parts of it.
My suggestions to make this game better is to change the button to jump from W to space bar instead. Its more intuitive and easier to press. As for the enemies make them less powerful especially during the first few levels because the players are still getting used to the controls and understanding your mechanics. Slow down the moving platform because the current speed is a bit too fast which makes it hard to maneuver. I find one of the moving platform to be weird when it moves diagonally passing through the walls. That is a hard level due to that.
Anyways keep up the good work there :D