Can confirm that the sound doesn't work for me either, but even without it I enjoyed the game! Would have loved to see some more levels (Or at least one proper level) but it's really good progress for having worked solo!
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Sorry about the sound - it may be because I have set it to be muted by default on purpose (even though that was a bad idea). If that is the reason, then you can turn it up in the Settings menu and the game will become very different. I'm glad you enjoyed it anyway! I'm determined to be more efficient and have more time to make more gameplay content at the next jam if I participate.