Shoot enemies and earn money to upgrade your weapons with the non-linear upgrade system. Enjoy the 6 free worlds that each contain 45 levels over 5 different game modes.
Controls:
Move: WASD or Arrow Keys
Aim: Mouse
Shoot: Left Mouse Button
Special Weapon: Spacebar
Change Weapon: Shift or Q
Pause: Esc or P
Fart Blaster 
Snack Time 
Zombie Head Venus 
Tidal Bubbles 
Octane Racing 
Ultimate Spaceship 4 
Darts Sim 
Halma 
Battle Area 
The Legend Of RobinHood 
Snow Queen 5 
Stone of Pharaon 
Pirates vs Ninja 
London Theatre Murder 
Flower Sudoku 
China Mahjong 
Siege of Troy 2 
Maya Pyramid Solitaire 
Daily Trees and Tents 
Bomber Bob 
Ultimate Escape 
Metal Animals 
A Nonogram a Day 
Valet Parking 3D 
TimberMan 
Lost Island 2 
Where Is Osama 
Juicy Fruit Match 
Army Base Conquer 3 
Ancient Rome Solitaire 
Twitchpack 
Easter Bubble