So I gave the 1.0 version a try. After the tutorial, I went to endless mode to play around in there.
Some weapons are definitely more useful than others. Seeing as the vast majority of enemies you fight fly around, the ground-based/short range weapons are pretty much useless. The only exception is the Tornado weapon, which is really difficult to use as you can't aim it. By far the most useful were Wave and Split.
There were quite a variety of enemies, however it felt like you never really got a chance to bother to learn their attacks and how to avoid them for several reasons. First off, you take very little damage at all times, so you can pretty much take a bunch of hits and just keep on moving. Second off, the game encourages you to go bonkers with your weapons and wipe everything off the screen without even considering what you're fighting, so it doesn't feel there's much need to learn any strategy there either.
Also, not surpisingly, enemy shots were very difficult if not impossible to distinguish while there's tons of crap flying around the screen. And yeah I had the graphics set to Ugly. I'd reccomend making enemy shots have a very distinct visual appearance that doesn't match the player's shots, or give them all a certian outline and make them drawn on top of everyting else.
Another minor issue I had is the terrain can sometimes be teeny little blocks that barely come up to your feet, yet they still impair your movement. I think if the player runs into a block that's less than a few pixels high, the player should automatically step on top of it. It's just aggrivating to be moving forward, and suddenly stop, then you notice a tiny little block at your feet.
I'll try the mission mode after and see how that fares.
Bugs:
Managed to slip my way into the ceiling. I could crawl slowly left or right.
http://rydia.net/udder/!crap/copyKittyInTheCeiling.jpgSpotted an enemy stuck in the floor.
http://rydia.net/udder/!crap/copyKittyStuckEnemy.jpg