Biplanes.io is very similar to Wings.io
You have an airplane under your control and your main goal is to kill all other planes. Collect blue crystals to increase your level, each level gives you points to improve airplane abilities such as armor, regen, damage, boost.
Try to use different builds and create the most dangerous airplane, as for me the damage ability is the most useful. For each kill, you receive points so it is addition option for how to increase your level.Have fun and see you in game.