Congratulations, nice entry! I loved the different puzzles, and I was amazed by how many levels are in the game! Furthermore, different mechanics are explored in the game, and that was really cool!
I'm a bit perplexed about the core mechanic of "not doing what it should do", because it's not something really exciting or that changes the way you solve the levels... It just makes the levels longer. Maybe rethinking the malfunctioning effect in a way that benefits or changes the puzzle, would be an idea to improve the challenge and avoid a bit of frustration from the player. I read below that you were already considering other possibilities, so I would be glad to play the extended game!
Regardless, I had fun with your game, thanks a lot! :D