That's awesome, best of luck developing it further!
I have completed both the right and left level, and then I spawn up top, on the platform, but I can't find a way to move up and on the ground I didn't find anything. Now that I think about it, am I supposed to form a staircase by detaching blocks in order to move up? (I would test it, but I have closed out of it and it seems it doesn't save progress)