This game was pretty good! I like the idea a lot, and the dedication to making the belt dragging work is commendable. I only have two issues with the game. First, I really wanted to click on the hotbar icons to select them. Second, I found it kinda demoralizing whenever I got a new word and the last factory I just made was suddenly redundant. I'm sure that is just a symptom of jam deadlines and scope, but I thought I should mention it.
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Thank you for the excellent feedback! I also noticed that during my own playtesting, but to be honest, it was partially a benefit for this jam. I had no time to optimize the game, and i found that keeping all the machines for every word makes it start to lag pretty bad XD
In the future though, you raise an excellent point. It would be nice if the player had a reason to keep around the old factories, and games like Factorio and Shapez.io offer some ideas of how to offer those incentives. I'll keep at it! Cheers!