Neat idea. I like how the mini-games have different effects on the plane. I could imagine a higher difficulty level where multiple mini-games can happen at once and you have to decide if turning or dropping water is more important.
I wasn't really a fan of the plane's controls, though. It felt really sluggish, both in movement speed and turning radius. I'm guessing the slow speed was to account for the mini-games, but I think a tighter turn radius and a boost button would've made the plane part a lot more fun. Maybe the boost is another thing that could break.
If you polished this idea up and gave it some nice aesthetics, I could see it making a fun mobile game. The mini-games especially would work well on a touch screen.