Thank you for giving the game a go! Audio wise, while not 1:1 to arcade, it is fairly near. It is a project that can be improved, in particular slightly more refined player movement and camera mechanics. While updates have not been many in recent times, it will for sure see improvement in the future, when time allows.
Hi! could you finish this with the extra levels and the final alien boss from the Master system version ? Maybe with the power ups from the remake? Basically, if you hold down the button, you could throw a super giant ax, and fireballs like in adventure Island which can destroy rocks and other things. Good work so far.