Try not to take any of this criticism personally; I just want to point out several things you could have done a little better (imo) for the next time you make a level. I only want to help!
Here, if you're supposed to use the bouncy to reach the ice platform, perhaps point it out because it's not immediately visible to the player.
The arrows on the wall across from the time travel (not visible in this picture) imply that you have to do a wall hit, which had me stuck for a while before I noticed the bouncy myself. If you don't notice the bouncy (like me), then this is an impossible jump to make. (and you miss a Gem too)
This issue is averted if you wanted the player to notice the bouncy when they hop back from grabbing the Gem, though you might have wanted to add an arrow sign or something that you can only see from the platform directly under the wall arrows.
The "Catch the Gem in midair!" help text I had no time to read before I had already missed the Gem, so you probably should have moved the help trigger a bit further away from said challenge to give more reaction time.
There's no warning for this fan, which led to a frustrating OOB. I would think even an MBG "Danger!" sign would be sufficient for this.
The tube near the end is just... why. It's easily the worst part of the level, because since it's an MO (when you really should have made it a moving platform) you have to be jumping constantly and uncontrollably, which, added to the fact that it doesn't give you any time to get out of it at the end, makes it incredibly frustrating. If you're supposed to be riding along the top of the tube, that should have been made clearer.
Anything else not mentioned here was pretty solid, this certainly was an interesting level. Keep it up.
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