Solid game!
I really liked the concept, and the idea of everything on the island decaying when you're not near it is pretty cool. It brings a bit of interesting strategy to the gameplay, instead of just fighting enemies.
The grid-based lighting system is also super cool!!
This is a sort of game I could definitely see being more polished with more content added, and with an addicting enough gameplay loop I could see myself playing it for a longggg time.
Great work! :)
-D