Fun, definitely challenging. I get the Submachine vibes everyone does, but the puzzles are original, and there's nothing wrong with taking inspiration.
Also glitched! Here's a rundown for anyone who, like me, was like "Is this a glitch or am I missing something?" (Mild spoilers)
-"I can't pick up any of the items at the beginning. I'm clicking on them but just getting a bell noise" You aren't missing something. This is a glitch, try another site. (It worked for me on Armorgames, but I've seen the same bug reported there as well. I am not aware of any other workaround.)
-"The bunker door ate my key but it still won't open" You're probably missing something. See if there's something else on the door you can click on. Check the walkthrough if you're stuck.
-"Is this color cube glitched" No, just really hard. Check the walkthrough if you're stuck. Note that the video walkthrough inputs the solution the first time.
-"I can't move these pins to the positions that I'm supposed to" You're probably missing something. Try clicking the large lever at the bottom again
-"I can't get this cube inside the vibrating cube at the top" You're probably missing something. Fiddle around with the levers to the left and right; it took me a few tries.
-"I can't open the door on this train" You're probably missing something. This requires dragging, not just clicking. It is the only place in the game that requires this. Little annoying.
Those are the only ones I'm aware of. Enjoy!