Hi Adam;
thanks for the reupload! Played it on OpenSuse using Wine.
Quick Feedback:
-The visual style is great!
-I love the idea of the gameplay.
-I like the idea of the rollback as a sort of "player defined checkpoint-system".:)
-Grinding is underused. I also recommend switching it with rollback on the default gamepad config, since it is hard to reach otherwise.
-Some levels were really fun! I especially liked Level 5.
-You need some polishment regarding the movement and the level design. I just quitted at level 8 since I can't find the exit, and jumping at the wrong place lets you fall from the floor since the "original" gravity is restored. Overall, there are some glitchy things - using the primary shoulder buttons makes you go sideways and lets you rise up walls!
-It might be since I used Wine, but the performance is hellish. Your game really attempted to toast my CPU, and my system is rather beefy.
Greetings
Thunder