I think this game might have my favorite use of the theme so far. As others have said, the malfunctioning does not really feel like a significant part of the puzzles, or anything like that -- but that's what makes it so good, in my opinion. This game really does feel like playing as a malfunctioning robot. The malfunctions are not significant in some special, predestined way... they just are a fact of life for this robot, and we get to experience that by playing this game. I think that's really cool, and I really enjoyed that aspect of the game. I mean: seriously! I felt like I was a malfunctioning robot for real! It's a great encapsulation of that experience.
The raising-malfunction-rate-over-time mechanic also contributes to that. It really does feel like you're a robot that is just breaking down and getting more and more glitchy. I love it.
Also, I found there were some satisfying puzzles in there! Level 9 really made me think and I had to restart it a couple times.
Strangely, level 10 seemed really easy? You can just go hit each of the three switches (the ones where you press G) and then you win? I think the design of level 10 might have gotten over-thought and you may have missed the obvious solution (I've been there, when designing puzzles!)
The only mechanic I didn't really understand is why pressing Repair always damaged the robot. I think it could have been useful to be able to repair in some cases, due to the spikes, although I eventually learned that you could press against a wall to change the spike cycle... so I guess the spikes are a pretty fair puzzle element (the player should be able to avoid any damage unless they malfunction).
Overall though, I really do think this is one of my favorite entries so far--the puzzle content was satisfying enough, and the malfunctioning mechanic was super cool. I also enjoyed the music. Great job!