I like the idea a lot. I had some trouble telling what was going on. Even when my boat tipped all the way nothing seemed to happen. The red bar at the bottom increased sometimes but that seemed to indicate over all progress not the amount of lava spilled. I wasn't sure what the cannon mechanic was for. I could shoot the rafts but there didn't seem to be any reason to do it. When they first appeared I thought they would be obstacles or something but they always stayed off the right, even when I moved forward.