(I am now in a rush to test as many games as possible to help, so please do not mind the cursory reviewing style.)
Game page: like the wording! XD ‘Using your amazing powers of revolution,’
You are talented 14-year-olds wordwise. :)
seeing the screen capture about the key printed on the cube: would you believe this was one of my ideas during the brainstorming for the game jam? XD
even a loading screen! lots of visual details
controls are QWERTY-only instead of layout-independent
sword and shield: ANOTHER idea I had during brainstorming! XD :)
beat the game; short, but as a prototype, excellent! Great ideas, great presentation, original. (By the way, I actually kept the ‘printing-on-the-cube’ idea in my own final submission!)
Really liked it; some sounds would have made it even better. Maybe also a way (such as UI display) to show the user the hidden faces, as it can be hard to mentally figure out (I had to count the tiles for the shield-sword level).