I like the pixel art you used for this wave defence game and your merging feature

very good very simple nice

I give this game a 3 star because the jumping mechanic has to much gravity so climbing the beginner mountain is too difficult but I do like the backround sound and art used (also to fix the gravity in unity go to rigidbody on your player and lower the gravity number/value)

nice style I like the shading on the helmet

good use of shadows on your character I like it

nice work with colouring and shading