My first game jam and errors were made. I think it's attempting to access an enemy that has already been despawned. I'll have to allocate more time to testing for the next jam :)
Great game well executed. Maybe 'hold key' with radial menu for selecting combinations would be quicker. Also 'Air resistance' could be slow fall and allow movement through wind currents.
I broke it by being stupid. Didn't realise I had to click the victory button the 1st level, so quit. Upon starting a new game the victory no longer appears.