This feels like a good time waster of a webgame. I think if you added shop checkpoints and/or cheapened the prices a bit it would feel like it respected players time a little more. But overall a good game, I did still sink a good amount of time to get the final upgrade of 1 cannon, add 2 layers of balloon and upgraded the ship.
I will say, I feel the order of ship upgrades visually was a bit off, 2nd should've been the starting boat. then 3, then 1 :p