After having played this for a bit, I can easily say this game is quite entertaining if you're looking for a quick fix. It does, of course, come with pros and cons:

Pros -
+ Straightforward, no ♥♥♥♥♥♥♥♥ game. Click and shoot and survive. Nothing to it! A nice, quick challenge for those seeking one without really jumping through hoops of fire.
+ The pixel art is pretty darn good. Haven't seen this kind of quality since the SNES/PS1. Even for a port, it looks nice.
+ Cheap. 2 dollars is pretty piddly so you can pick it up, play for a bit, and put it down at your leisure without feeling like you dumped an investment.
+ Upgrades carry over from death, so you can start again with stronger abilities if you unlock them.
+ It's a sledgehammer. The Savant music is an awesome addition if you're a fan of their works. It's in the title, so one has to assume people who play this are fans of the music too. Duh.

Cons -
- ♥♥♥♥♥♥♥ difficult. Don't expect to beat this in one sitting. It picks up in speed fairly quick and can be tough to progress if you aren't paying attention.
- Only one track during the actual game, which can be pretty monotonous. (Not sure if you can change it in-game or not).
- Really fast. Like stated before, you have to pay attention and things can slap you silly if you're not looking.
- (Controller) Weird camera issues. You have to use the right stick for attack, but unless you abuse the five missile charge attack, you're constantly going to be off focus from your character, "hiding" some enemies from view, like the sawblades or Trapjaw.

Overall, its a great game, its cheap, its challenging, and it has Savant music. Quick thinking and a bit of luck will carry you far.

After having played this for a bit, I can easily say this game is quite entertaining if you're looking for a quick fix. It does, of course, come with pros and cons: Pros - + Straightforward, no bullshit game. Click and shoot and survive. Nothing to it! A nice, quick challenge for those seeking one without really jumping through hoops of fire. + The pixel art is pretty darn good. Haven't seen this kind of quality since the SNES/PS1. Even for a port, it looks nice. + Cheap. 2 dollars is pretty piddly so you can pick it up, play for a bit, and put it down at your leisure without feeling like you dumped an investment. + Upgrades carry over from death, so you can start again with stronger abilities if you unlock them. + It's a sledgehammer. The Savant music is an awesome addition if you're a fan of their works. It's in the title, so one has to assume people who play this are fans of the music too. Duh. Cons - - Goddamn difficult. Don't expect to beat this in one sitting. It picks up in speed fairly quick and can be tough to progress if you aren't paying attention. - Only one track during the actual game, which can be pretty monotonous. (Not sure if you can change it in-game or not). - Really fast. Like stated before, you have to pay attention and things can slap you silly if you're not looking. - (Controller) Weird camera issues. You have to use the right stick for attack, but unless you abuse the five missile charge attack, you're constantly going to be off focus from your character, "hiding" some enemies from view, like the sawblades or Trapjaw. Overall, its a great game, its cheap, its challenging, and it has Savant music. Quick thinking and a bit of luck will carry you far.