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
Construction Breaker 
Valet Parking 2 
Car Parking 
Halloween Party 
HeadLess 
Jolly Jong Journey 
Audi A8 Puzzle 
Falling Sudoku 
Word Up 
Fruit Slots 
Bad Cops Police Car 
Simon Memory 
Hot Air Balloons Parking 
Triple Mahjong 2 
The Dream Factory 
Daily Kakuro 
Nock Nock Nocking 
Table Tennis 2 
Falling Candy 
Daily Dog Pooh 
Basketball Master 
Freecell Klondike Solitaire 
Ford Police Puzzle 
Daily Same Game 
Hunter Willie 
Puzzles Berlin 
8-bit Dash 
Halloween Monsterball 
Dark Lands 
Evil Wyrm 
Aston Martin Hidden Tires 
Fairytale Trouble