I keep playing it and I love it.
It would be beautiful, that at the start there was the inscription INSERT COIN and with a keyboard key of the Amiga, you can insert the COINS. If you go in game over create an inscription: CONTINUE? with a countdown and if you insert the coins you take back the game exactly where you're dead, but the score resets.
Enter the difficulty level by also being able to disable CONTINUE option.
Tried on Mister FPGA and the game runs very well. Sometimes the pad keys change their configuration, sometimes to jump I have to press the directional back to the top sometimes I press a key to jump and a second key to launch the fists. I have to figure out if the burst punch sequence is generated if I keep the key pressed or it's a specific key. Wonderful game.