The concept is really interesting. 

But there should be some kind of way to lose, like limited robot spawns or something like that

I like the concept, and the lil' robots are really cute!

I really enjoyed this game. It had a great concept and I loved the level design and that it progressively got harder. One thing that I had a problem with was being able to differentiate between conveyors spinning left and ones spinning right without actually testing them, so some visual difference would be nice to add if you decide to update the game in the future. The music was great and I really got a sci-fi atmospheric feeling from it and it matched the style of the game really well. The art style reminded me of old flash games I would play on onemorelevel.com or cool math games and I loved it. One thing to note is that the thumbnail for the game really caught my eye and made me click on it first so great job on that. Overall amazing game and I hope you continue working on it after this jam!

The browser build won't run in my browser. Please let me know if it does work in yours.

(Edit) I fixed the issue with the browser build