I was also making a game and looking for someone to take on the difficult part — on-chain mechanics. In the end, I turned to https://cowchain.io/ and it was the right decision. They helped me come up with the tokenomics, built smart contracts, added marketplace logic, and even conducted a security audit. I didn't expect such deep involvement. The integration went smoothly, the game became more lively, and players got the opportunity to sell items to each other. Thanks to this, the project rose to a new level.