The loop around to the tutorial after the credits is intentional, I wanted to keep in the mood with the whole "wrongly joined spacetime" thing, and since the player usually moves between levels by falling down, I felt it might feel it bit mindfucky to end up by falling down where you thought was up. As for the gameplay I completely agree, I really wanted to add more to it but I just ran out of time. I also really wanted to add more complex puzzles, but with only to present mechanics (the orbs/platforms and the wrapping around) there was only so far I could take it.
I definitely plan on adding some more features when I'm allowed to though.
Thanks for the feedback <3