If you got One Gun Guy when it was free, it’s an okay little game, but at its base price of $5–or even its sale price of $0.70–it’s much harder to recommend. Not only is the entire game only around 20 minutes long, but the level design can be kinda repetitive at times, with more than a few areas that just make you stop and wait on stuff (the frequent invincibility powers are mostly just used to skip the waiting–assuming they’re not in a position where you can’t even get back to the enemies before the power runs out). Worse, hard mode doesn’t change the level design at all (at least for the few minutes I tried it); it just disables your power-ups, and when I took a break, I learned that the game doesn’t save your progress at all: if you don’t beat the entire game in one sitting, you have to start the whole game over from the beginning.

Without being free, it really pales in comparison to actual free games, like this one:

• Amelite
  

  38 minutes playtime

  4 of 13 achievements

Platformer, no controller support. A moves left, D moves right, W jumps (IIRC you can also use spacebar if you want), and holding left-click draws a platform like in Kirby Canvas/Rainbow Curse. Platforms slowly start to disappear after a second or two, and the game has trouble filling your platform meter back up when it’s supposed to, so to get around this, you can simply right-click to remove all drawn platforms instantly while also filling your platform meter back up to full.

Level design is okay, but as you can probably guess by the total playtime, this game doesn’t exactly reach its full potential, either. The game introduced no-drawing zones? All you can do otherwise is move and jump (and wall-jump and grab ledges). The game introduced turrets? Just draw a line to block them. The game combined turrets with no-drawing zones?? Yeah, just keep running left; you can pretty much keep pace with them until you reach the next drop. The only time I actually had some trouble was when the game reused the path-opening blobs but quietly made it timed, yet you also have to ride a moving platform up so you can wall-jump up the no-drawing shaft; it’s always irritating when the game makes you do a timed challenge that involves you having to wait on stuff.

Overall, though, it’s a decent little game, and I can recommend it since it’s free.