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8Bit Action Soundtrack

by Bogart VGM

- CC BY-SA 4.0 - 

https://opengameart.org/content/8bit-action-soundtrack

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Kenney Fonts

by Kenney

- CC0 1.0 - 

https://kenney.nl/assets/kenney-fonts

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Retro game sound effects

by Vircon32   

- CC BY 4.0 - 

https://opengameart.org/content/retro-game-sound-effects

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Rolling Ball Assets

by Kenney

- CC0 1.0 - 

https://kenney.nl/assets/rolling-ball-assets