All these people from freesound.org for various sounds I used: newagesoup, schalkalwis, qubodup, jobro, leszek szary, rioforce, kwahmah, rhodesmas, goldendiaphragm, cabled mess, ldezem, lehvee, inspectorj, orginaljun, errysn, qubodup, justinvoke, the sacha rush, joao janz, pbimal, annyew, impactSoft
Onishi Yohei ("024") for his help in testing the game, the creation of puzzles #100, #108, #109, #110, #111, #115, #116 #119, and the assist on puzzles #17, #38 and #118