Nice and fun game! But the water flow does not seem to be out of control, rather, it seems scripted... though it would be difficult to make it random in a platformer game as it would make the game very hard but you can try doing something with it in post jam version..
The concept is very good outside of the jam theme... You can make a nice platformer with it.
Suggestions
- Make it so the pressing 'enter' also clicks the button, not just 'space bar'.
- The animations seems to have a problem in transition, the animation gets stuck at one point and keeps switching between one frame to other very fast, though it is not much noticable but worth looking in at and fixing.
Great Job!