I like the game!
A few notes:
- I discovered a bug, if I die with the weapon, I don't get the weapon when I respawn and so I can't progress in the game.
- The game could have a story, the visuals look good, but if you had made your own assets, it would have looked better. The puzzles are creative, although I couldn't progress due to the bug.
- Instead of "dimension change", there could be time travel, similar to "Portal Reloaded". Or if you wanted to insist on changing dimensions, there could be some graphic difference between the 2 dimensions. (E.g.: the sky is a different color, the walls are made of different materials, etc.)