This game is good but I think that you could use some improvements. Consider adding maybe a upgrades menu when you collect exp during a run. Also, consider more worlds, being able to choose when to shoot instead of just a continuous fire, add somthing of a story to this game, and, on this one people will probably disagree with me, but add checkpoints. The one thing I have to say about this game that they shouldn't change is the music.
one thing that i dont get is that even though they capture the ship, they still have to have to pretty much knock the treasure out and drown it to accuire it.
I love this game the only thing i can find as a problem to the game is that you can only have one active team at a time, if i would have a suggestion to this i would say have multiple team screens so that we can find all monster evolutions without having to either start the game over or taking out your good monsters.