For myself, I realized that this platform is still very damp and unable to withstand heavy loads. The fact that the contract did not return superfluous tokens immediately after an unsuccessful transaction is altogether strange for me.
? The NEO platform was super stable and super super super fast and did not crash under heavy load? what are you on about?
The smart contract and explanation of the contract and Red Pulse instructions and refund policy could have been a bit better.. (this particular contract was not designed to return tokens- refunds are now completed)
What else is there?
Yes, in general, there are not any problems, but the refund should be in the contract. I think this is the base.