Crefence

Description
Crefence is an Atari 2600-inspired side-scrolling run 'n' gun game. Jump and shoot your way through five levels, each with its unique enemies and hazards, as you explore a strange island.
There are multiple weapons to use, with different firing speed and power. Taking a single hit is enough to kill you and send you back to the start of the current level, but continues are infinite.
Level 2 changes up the formula by taking on a top-down perspective, where you have to defend against enemies coming in from the top of the screen.