How extract return data from call

Question

I'm writing raw EVM op-codes, and want to return result data

contract Test {
    address public addr;
    bytes public sourceCode;


    function deploy() private returns (address pointer) {
        bytes memory code = abi.encodePacked(
            hex"60003560805260206080f3"
            );

        sourceCode = code;
        
        assembly { 
            pointer := create(0, add(code, 32), mload(code)) 
        }
        addr = pointer;
        return pointer;
    }

    function win() public returns (bool, bytes memory, uint) {
        address a = deploy();
        (bool sent, bytes memory data) = address(this).call(abi.encodeWithSignature("func()"));
        uint returnValue = abi.decode(data, (uint));
        return (sent, data, returnValue);
    }

This bytecode corresponds next opcodes:

PUSH1 0x00
CALLDATALOAD
PUSH1 0x80
MSTORE
PUSH1 0x20
PUSH1 0x80
RETURN

I validate this opcodes on this site

This opcodes take first byte from calldata, placed it into memory and returns this memory as result.

In remix if I call function win it returns true and 0x0, but in EVM Playground it returns expected result (first byte from calldata)

My question is: what I'm doing wrong? How can I fix my opcode to return result correctly? No, I can't just write normal solidity code, because I have strong limitation on code size