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
"Happy slaves are the worst enemies of freedom." - Marie Von Ebner
"It was always the women, and above all the young ones, who were the most bigoted adherents of the Party, the swallowers of slogans, the amateur spies..." - Orwell
"It was always the women, and above all the young ones, who were the most bigoted adherents of the Party, the swallowers of slogans, the amateur spies..." - Orwell