VoidRunner

Coins: https://opengameart.org/content/coins-asset

Hearts: https://opengameart.org/content/heart-pixel-art

Sounds: 

JUMP: https://samplefocus.com/samples/8-bit-jump-sfx

Shot: https://samplefocus.com/samples/8-bit-shot

Laser Sound: https://samplefocus.com/samples/8-bit-kit-lazer-5

Coin Sound: https://samplefocus.com/samples/sfx-8-bit-type-video-game-coin-sound

Death Sound: https://samplefocus.com/samples/retro-game-sfx-creature

Bosses: https://opengameart.org/content/minotaur-0