Credits / Lizenzangabe:
Original idea: Itrain
Developers: Marc and Arndt
Special thanks: for the nice buttons and the nice sound
Butten Based on the original by André Holtz, licensed under CC BY-SA 4.0. No changes were made.
orginal sound by Phoenix_Connection_Brazil, license under Inhaltslizenz – Pixabay . made changes
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Phoenix_Connection_Brazil - Pixabay
Urkunde – Namensberechtigung – Gleich 4.0 International – Creative Commons