Well done on this game! Its a neat concept and has lots of potential. Currently however I didn't have that much fun with the game because you were doing very little most of the time, and the movement was very restrictive. I think having tighter movement together with a more compact map would've already done wonders.
The rebirth mechanic also felt very odd, since after level 3 I always ended up with a useless critter that'd get stomped quickly. In that vain I would've really liked a hiding spot for the spiders. Once they locked onto me I was destined to forever kite them.
Don't be fooled by my critiques though, I always try to give constructive criticism on the part of a game that could use the most improvement. This game is well and truly within the best 25% of games I have played thus far. Well done!