They're so cute! Congrats on the art, I love it!
The characters are a bit slow to move but as soon as you pop in the tank it's like nyooooooooooom, hahaha :D
It's fairly easy to cheese the ennemies though, you can pack then by havinf then walk into a wall, and then just run circles around them :D. On one level I had to gather 12 resources, I killed all ennemies and they only dropped 10 so I was stuck :(
Anyway, good job, keep it up!