Rebel Assault is completely broken. The controls are entirely too sensitive. Even if you drop the framerate and difficulty to get pass Beggar's Canyon, you then encounter the awful aiming controls in the other stages. The second game is moderately more playable, but ultimately was much better on the 32-bit Playstation console port, so if you really want to play the second game use the methods available to you to play that one instead. I'm really concerned with GoG knowingly selling broken unplayable games. Their should at least be a warning or disclaimer on the game page. If I could get a refund, I would do so.