Here's a video of the bugs I mentioned:
At 1:15 you can see the problem in MAME, in the Popeye game. The character dies if tries to jump.
2:05 - the game Q-Bert with graphic issues
2:45 - Killer Bees is working properly.
Note: all three games above are using the gamepad.
3:10 - Frogger is only using the keyboard. And its graphics are all messed. However, note how the audio sounds natural.
3:50 - The game TURTLES also uses the gamepad. Nothing wrong with it.
5:40 - Now I am using the emulator O2EM, 1.20. The recording could not capture the game in fullscreen (like it did with MAME), that's why you are seeing the game small.
Frogger's audio is somehow weaker when compared to what we hear in MAME. And also not recognizes the joystick. Note how the graphics are all OK.
7:30 - Popeye also running in O2EM. The character can move freely. Only at 8:10 it dies, after touching Brutus.
9:15 - Notice how the game Q-Bert has no graphic issues in O2EM.
P.S. One more thing: the same ROM behaves differently in O2M 1.01 and 1.20. In 1.01 Popeye can't beat Brutus and may walk near him. Also Brutus doesn't throw anything.
In 1.20 Popeye can't even touch Brutus, that will throw stuff at him. And 1.01 isn't working with my gamepad at all (and fullscreen mode), both things available for 1.20.