Achievements...
	Ad free...
	Gems...
	More content...
	Weapons...

There are lots of OpenFeint achievements to rack up for blasting feats.

There is a free ad-supported version of the game available to save you a few pennies.

Collecting gems dropped by defeated enemies improves your star rating for each level.

Neoteria is a short game at the moment, but the developer has promised more content once 20,000 copies are downloaded.

You get slightly more powerful weapons in Normal and Hard modes, but they are still not up to the extra challenge the game then throws your way.