here is an idea for a nother four star, you should have a dinosaur (because i cant think of any other animal) that has at least 7000 health and at least 2000 health with no healing:) it could be called v. rex or t. rex, i think v.rex sounds better:)
make a boost that helps critical chance and you can call it lesser critical boos,critical boost and critical boost please make that boost it would make the game better and i might even spend money on creds to get gems
you should be able to trade or give people your unwanted curios the game would be much better i would spend real money on this game if you could but scince you cant whats the point
 "Bloons Monkey City"){kind=icon}
 "Curio Quest"){kind=icon}