It's free on Steam, so it would have to really suck to not recommend it.
This is a very simple game with no instructions at all. All you do is move left, right, shoot, and select weapons.
There are 10 levels. No real story. Old school graphics.
If you want something to give you 5-20 minutes of gameplay, you could do worse...and better.
Bloody Walls
Bloody Walls
“Every record been destroyed or falsified, books rewritten, pictures repainted, statues, street building renamed, every date altered. The process is continuing day by day. History stops. Nothing exists except endless present in which the Party is right.”