Really nice work! 30 min passed and I didn't even noticed it. Bit of bug report: The game crashed at "associate 5", first it didn't combined the blocks, the it stopped spawning and than crashed. I don't know how web vesions work, but some sort of save would be nice. (Also I think this would be perfect for mobile platforms as well). But again really awesome work!
Thank you so much for playing and for the feedback!
I'm not sure what happened with the crash you've experience, I've changed the ways some of the machine behave, and I didn't get time to test every possible outcome. I'll make sure to test it more.
As for the save, it's something that I want to implement, but I've ran into some weird behaviors in Godot, I need to do a little more research to know how I should be doing it.
And I do plan on releasing the game on mobile at some point, but I want to focus on the Steam version first, the mobile version will come after :)