Nice concept! We had a similar idea during our brainstorm, but finally decided to not go that way, so I'm happy to see the "rotating level" concept done by somebody else =D!
The graphics are nice, and the musics are bangers <3. Excellent choice!
The gameplay is really fun, but the controls are a bit tedious : the acceleration of your character, either vertical or horizontal, is waaaaay too much. And despite have 3 hearts, you generally get one-shot, either by touching a spike, or touching an enemy, which makes you bounce in said spike xD.
The level design is nice, but it feels a bit disappointing that the two versions of the levels ("normal" and "rotated") are, in fact, two separate parts that have nearly no common parts. I really enjoyed the first level because you go through the same path, too bad the other levels doesn't do the same... But I guess it's a bit too much to ask for a 7-days game jam ^^.
Overall, this is a nice entry that just needs a little bit of tweaking and refinment. Great job!