Each level gives a set of moves (left, right, ...) on the right area, you have to assign them all to the button(s) on the left, forming sequences of moves you can repeat.
Then you press play (bottom right) to lock the assignation and press button 1 or 2 until the little guy reaches the end (warp thing). There is also a stop button to reset the level and a undo button to rewind.
It's all mouse controlled.
We understand how it can be unclear and will add some precisions on the itch.io page, hope you will give the game another try !