Graphics are really good and jolly looking! Backgrounds will work well in "just" SCREEN 1, but it would be nice to see them in even more colourful SCREEN 2.
I watched it´s video a bit, for me it feels like it´s a bit too easy. But I like it because of the jolly colourful graphics and cute hero and enemies, if insects can be called cute.
For conversion, smooth movement with sprites is a must and I would also suggest using inertia to make game harder.
Flying with inertia will give this game a nice extra touch, me thinks.
Flying of the hero insect would look cooler and you would also have to think a bit in advance to know when to stop moving.