This game gets a lot of mileage out of a very simple set of rules. Impressive! There are a lot of
"auto-platformers" in this jam, but yours stands out with a fun and responsive block-drawing mechanic.
However, I think that some of the levels are too big-- in challenges where I'd expect to be racing to save my little guy, I end up having to wait for him to catch up. Also, it's easy to build a tube that avoids all of the obstacles entirely. Another reviewer suggested a block limit and I think that'd quickly make things more strategic.
Great job!