Yeah, we all were able to only do about 48 hours at most as well - I'd hoped that if the level editor was robust then we could churn out levels really quickly, but we didn't really have non-edit mode working until the final 2 hours, and by then there were only a couple of us free who were too busy fixing bugs. We might do a postjam update though, because I think it's one of those designs where you can start to discover cool interactions the more you play around.
Here's the third level as I built it, interested to see if your solution is different!
(spoilers)