Needs some clarity
It's a good experience for the most part, but if you do manage to get the necessary tools to fix it, I would suggest adding things like the meter for the catapult, and perhaps some icons for how many rocket boosts you have left. I managed to buy every upgrade within three tries, and the items in the store are a nice touch but perhaps have them actually do something? Oh, and perhaps after each try, a screen stating how far away you were from your objective would be nice.
Again, it's a solid game and quite playable, but you could make it even more, and I hope you get the chance.