Fly Or Die is a side-scrolling side-scrolling shooter in which the player acts as the pilot of a military aircraft.

Link to the game in the Steam store

Instructions for activation keys to Steam:
1) Download and install the Steam client
2) Register an account or log in with your username in the existing one.
3) Go to the "My Games" and select "Activate via Steam ...", and enter the key received after payment.
4) Once activated, the game will appear in the game list (Library) and you can download it