Everyday Shooter+Katamari Damacy+one of the best level editors out there=Blast Works
It's funny, you know, people are always badmouthing Nintendo's third-party support, so you'd think when a third-party title worthy of recognization comes along, they'd jump on it in a snap. Unfortunately for Majesco's Blast Works: Build, Trade, Destroy, this is not the case. Too bad.
This is truly an excellent showcase for what happens when developers actually put some thought (read: A LOT of thought) into their games' level editing systems. You can control everything from the background to where enemies appear in a level. You can create your own ship, your own enemies, your own final boss. If you've always wanted to create your own simplistic side-scrolling shooter, this is a major purchase on your list. However, the only real problem was just mentioned: simplicity.
This game has all the difficulty of a flash game designed for five-year-olds. The only thing that might throw anyone off is the Katamari-like ability to gather fallen enemies and increase the size/shooting power/defense of your self-created ship.
The only other notable features is the ability to upload your designs to WiiConnect24 so other people can try your demented designs, and vice versa.
Here's the super-short rundown:
Concept: Basically, create your own side-scrolling shooter game.
Graphics: Katamari style animation, kinda blocky graphics. 7/10
Sound: The music is okay for awhile, but the level editor music gets old REALLY quickly. 5/10
Playability: Controls work excellently, no major flaws. Editor is simple to use, but difficult to master. 9/10
Entertainment: If you use the level editor, you will get completely absorbed into this game. If not, eh... 8/10
Repaly Value: Nearly endless. 10/10
Overall: 8/10 (not an average)