If you played Hotline Miami, and you liked it, you'll like this game. The colors, music, retro style and gameplay are very similar although this is a side-scroll. Similar to HLM, you have instructions for every mission. Very enjoyable, better if it's in offer.
I bought the game some time ago because never played when it was originally released. The game itself is awesome but requires some patience. Ecery stage is kind of a puzzle that must be solved with some precision or you'll get killed and have to start again which can be frustrating. It is kind of glitchy in my pc, don't know exactly why, but it freezes sometimes. Besides this and other minor bugs, I would recommend this game. I am giving it 3 stars because of the glitches, but as I mentioned before, the game is awesome, and without the bugs it deserves 5 stars.
I've been playing the game for few hours, and it is a great game. The music, the game play, and the pixelated style remembers me Kabuki: Quantum Fighter from NES. Of course, the music quality is better since it is a contemporary. I would recommend this game, It's really good.