I'm not one for Zachtronics-type games, but this was really interesting. I only played the tutorial since I'm a brainlet with the genre, but I still managed to have fun. Here's what I would change based on what I played:
-The background being grey-blue makes it difficult to make out the blocks on screen. I'd make the sky a different color or shade.
-The game is too zoomed-out at times. I think it would really benefit from allowing the player to zoom in and out.
-The part with the hole leading to destroyers was skippable by spamming blocks and jumping across them before they fell. Not sure if there's anything to do about it considering the mechanics of the game, but I thought I should mention it.
-I think the first puzzle with the extractor and destroyers should have some more explanation to it, I wasn't too sure what to do there.
-The sound effects were solid, it made every interaction feel good.
-The art, while simple, made everything instantly recognizable which is a big plus for a game like this.
-The scroll bar in the pause menu being a machine is a really nice touch, more things like that in the UI would be really neat if it doesn't distract too much.
-All the options you have in the pause menu are great, it's always nice to see so many options.
I think you have a solid foundation, great job mate! I hope more people check it out!