Thank you for your feedback! There are character speed upgrades after clearing waves 2, 4 and 6. I'm thinking about creating a portal which will be spawned after you clear a wave in order to get back to the fridge. Noted that for the semi solid platforms. I will make sure it will be available in the next update. This is not only my first jam, but my first game finished at this level.
Cool! Yeah, I got a bit lost waiting for what was supposed to happen after the first wave. I guess I was supposed to return and hit the button again eh? I almost think character speed shouldn't be the upgrade, because moving at a decent speed just makes it more fun overall, but that's just my opinion! Good job!