repetitive
The shield is a nice concept, but unfortunately i found it fairly ineffective. Consistently I found that several enemies would be lined up, all firing in tandem. There would be a stream of bullets, making it nearly impossible to kill them without taking damage.
It was very nice to look at at first, but after a short time the environment was just repeating itself, no doubt because the levels were extremely long.
Its fun for a few minutes, but it just seems like another generic shooter.