The mossy palette is great, and it really does feel like an old gameboy game

I really like the colour palette! Very mossy. It's a fun little game that definitely embodies the Gameboy spirit.

I'd like to say well done for a first game, making games is definitely hard. I think the menu screen looked pretty nice. I think one thing you could have changed to make this a little more fun is not have quite as long of a wait between attacks, or at least show some kind of ready bar so you have some feedback when you're able to attack again. I think the menu could also have used a few sound effects as well, I think that would have made it feel a little bit better. Overall though, great work, and keep it up!

My PC started lagging on campaign if I died more that 2 times.
Made it to level 3 at most.
It really looked like a game boy game, - the rotating bows and arrow shots but it still felt old school :) 
Arrow hit-back was cool but most times it did not register as a hit on the enemy.
The hit boxes felt pretty off as well, easier to hit enemies from below rather than from above.
Anyway, good job :D

Nice game! when I went to waves mode my pc lagged