the time switching mechanic was well implemented. and the platforming challenges were fun, the only issue I really experienced was some physics mess ups whenever I came out of the other universe

I like the simple approach of the game however I felt that the music could have been continuous instead of replaying itself every time I touched lava. Besides that it is a nice game.

Simple game but it all works quite well. Had a few glitches with clipping through platforms when switching worlds but other than that a nice game :))

Simple platform game with some levels. Some areas which can be improved:

Presentation: You chose a minimalistic, cartoony artstyle, which is good for short games made for jams. However, some more textures, animation, and decoration would have made the game much more fun and clear to play. You could have a custom font for hints and check that the spelling and grammar is correct. The soundtrack fits the theme of the game; however, the way it restarts at every stage is somewhat jarring. You might want a continuous soundtrack.

Concept: The game is a typical platformer. The left and right keys together to trigger X-ray is nice, but are there more interesting ways to combine the inputs?

Think more outside the box and try to have some more unique concepts/mechanics in your game.