DuoRiver They just don't look enough like something to avoid. Maybe make them jagged or something, and there is just 4, which doesn't seem like enough for enemies. Plus, it was right after a wave so I thought it was some kind of reward. I'm not really an arcade player so I might not have the best advice, however. Ran great though, no stutter at all and I have an older computer with an i3 but a half decent vid card.