And some quick tips from quickly playing:
D to select. I know, WTF.
F to shoot your normal shots, Down+D to Reload.
A for secondary shot, takes green bar
V for shotgun spell - useful for weak walls. Hold for stronger attack.
C for dash - S for jump.
Hold Z and arrow keys to look around.
X does something later.
To release captives, you need keys. Use keys by pressing D on them. (heh)
Heals are gem drops from doing 20+ combos.
When you are in the world map, press A to access menu. Here, you can buy upgrades and stuff with Bullet Points you amass from playing. You can also view status, and pressing the right arrow key lets you change MC's appearance. (D to hide textbox.)
Edit: Oh, and did you know the controls are customizable?
