AROS is not an emulator, but an Operating System. It doesn't run any old games or applications - if that's what you're looking for, stay clear of AROS (and MorphOS).
What you want is FS-UAE.
With the second game - a car racing game, no such luck. Just a grey screen. After that I imported other Kickstart ROMs but the launcher doesn't seem to show what I have imported and doesn't find many of them. Even for those it does find, the emulator just displays a floppy disk icon as if waiting for the Kickstart disk to be inserted. The launcher does seem to I match the Amiga model with the expected ROM and offers a choice of those that relate, but I couldn't do anything with the emulator after switching away from the first ROM. I couldn't even go back the original one with the 500 model.
There's way to many problems in that paragraph, while none of the descriptions contain any useful details.
What car racing game?
How did you try to "import" ROMs?
etc...
When you see a "floppy disk icon", does that screen have a white or purple background? If it's purple, the Kickstart is working and you need insert a game disk.
