Shop
Selecting Shop on the Stage Select Screen will take you to the Shop Screen.
Here you can exchange your points for new weapons and outfits.
On this screen you can freely equip any weapons or outfits already purchased.
C Button (Default: C key) Toggle between Weapons / Outfits.
D Button (Default: V key) Move selection cursor to secret weapons.
A description of the selected Weapon / Outfit will be displayed in the bottom left.
For secret weapons, the unlock requirements will also be displayed.
If you have achieved the prerequisites, then you will be capable of equipping
the respective secret weapon without needing to pay any points.