Fun for those willing to explore oddly enough. I couldn't get into the barracks on the second canon but I did force myself into the barracks on the third canon. Not that there was a reason to do so, it was just, it was there so I had to try. I think I got all the cubes on the third cannon, but I couldn't turn it to shoot myself up to the tower :( If the post below is accurate then I just couldn't find the right angle to select to box on. 

Some more tutorial (even on the game page works fine!) would be nice, as the controls were unintuitive. And the key rebind is broken, I would suggest instead of rebinding all controls for movement at once, each one should have its own rebind button as I just messed up the control scheme messing around in the settings and had to reboot the game to fix it.

Yeeted myself out of the world not knowing how the cannons worked, tbh pretty funny moment but not the most frictionless tutorial having to reset the game again there.

Cool game, don't know why I'm collecting cubes to shoot myself out of a cannon, but sure why not. Does feel a bit unfinished though, I shot myself through the floor and into  the void first time around. Still, congrats!