Hiya,
I encountered a few bugs in my playthrough.
When the ramp appears on the top tray items can be hidden under it and can carefully be pulled out, to the left, if the player is careful. But they are hidden and it took me ages to realise where they were.
Any items in the lower left tray when the conveyor is enabled are stuck there and can't be removed until the conveyor is switched off.
The sorter rarely sorted eggs into the fuel input. I had to switch off the sorter and carefully put eggs in there, but it would only take one egg at a time, and with many items on the screen it was difficult to capture one egg at a time. It would not accept any eggs if I was holding more than one. Eventually the fuel input stopped accepting any eggs at all.
The upgrade menus could be reworked for clarity. I found myself chasing through the various tabs and subtabs trying to find things, and having to scroll makes it harder to find them.
I'm playing in Firefox under Win10, Dell 7570 with 16gb memory else as spec. The game functions smoothly, there are no lag spikes and it's pretty light on all resources, well done because optimisation isn't something we often see so early in a game's lifecycle!
You have the bones of what could be a cracking little game here, good luck with the project!