Hmm, the mechanic looks interesting, but the pacing is pretty slow... at least for the first level, which is the only level I played btw.
All I was doing is scout-secure-salvage-build-repeat, I did this for 5 or 6 tiles and nothing significant seems to happen (except some of my troop starved to death).
So, my first suggestion is to make it less "tedious". Figure out what exactly which part of the game is the "fun" part and maximize it by reducing all the not-so-fun part. Otherwise, player will leave the game before they get to the fun part
As for the art, I like the characters, almost "ms paint + Star Fox" style... but the main map is not nearly as interesting. If you make the artwork for the tiles more consistent with the characters, you may end up with an interesting artstyle.
And each tiles are way too big. I shouldn't need to scroll, when the map is 5x5 grid