Awesome! Some thoughts:
- Juice and feel are great, though the overall screen shake made it hard to feel accurate for the first minute or two. Is there a way to convey that *impact* of a bullet shot without shaking everything on screen? On another play, I think it's the shaking of the enemies that feels weird?
- Love the interplay between shield, ammo, and splitting! Love the time slow!
- Content is good! Around 240k points I just let myself die because difficulty hadn't increased in a while and I didn't feel any pressure. Mebbe some variation in enemy tactics or new enemies that force you to change tactics?
- Music rips!!!
- This game feels ripe for high score competition. Instead of using content to raise skill cap, you could introduce mechanics to force earlier deaths. For example, make slow down a limited resource that doesn't recharge, increase enemy numbers and speeds without cap, or cap the number of shields available.
- Needs more frog
EDIT: Doh, I totally missed the "survive ten minutes part". When I let myself go I was at 1:34 left.