Squishy Fish and the Magic Doubloons

Arrow keys or WASD to move.

Space or shift to squish/cast.

F11 or Alt-Enter to toggle full-screen.

Draw the shape on a coin (top-left) and then squish to cast it. Collect coins to add to your spell arsenal.

Think of the turns in the shapes as clockwise/anti-clockwise (sunwise/widdershins?).