Level design is pretty good, the polish is brilliant, the visuals are simple but beatiful and the game feels great. However, I don't think it fits this jam at all. I don't think the game is too fit for speedrunning since it is more of a puzzle game or timing game without the requirement of much skill. Moreover, I believe that you could have implemented the overheat theme better, it works just as a timer in this one. The way I would have implemented it is that in the first place you overheat from your rage(overheat meter is full) and as time goes on you cooldown. While overheating your ability to smash walls as well as your speed is greater. If you cooldown you lose(instead of overheating). This would add speedrunability and actually use the theme as something other than a timer.
Overall Everything other than the implementation of the theme is perfect, but the lack of theme and speedrunability bring the game down a little, Solid game, solid entry, Amazing job!