Wow, this is very well made! At first it seemed a bit a simple but every level just kept introducing new enemies and units. There's an impressive amount of content - I've played for at least an hour and still haven't reached the end. I assumed the bear was the final boss, but then was more! I had to stop for now but might pick it up again later if I have time. The graphics also look great, especially given such a small resolution.
The one complaint I have is that watching all the actions play out can take a bit too long, especially during the enemy's turn. Some way to speed up or skip some of that would be nice.