This is one of my all time favorite games
...Let me see if I can help.............
Without a cheat, suffice it to say this is very much like an old time arcade game. There are two types of targets "good" ones and "evil" ones ...the evil ones are an yucky brownish color try hitting only them; teh "good guys are more human looking and have more color to them ...oh yea ...I almost forgot, before you go into the "Well" go to the options panel (up on top) and select "easy" for the puzzle difficulty...that should help. ... when you type the word "arcade" in make sure you are at the begining of the game.
difficult level = you have to hit each bad guy 5 times and you cannot hit any good guys
medium level = you need to hit all of the bad guys once and you cannot hit any good guys.
easy level = you still have to get most of the bad guys ...but it's ok if you get a good guy or two.
remember practice makes perfect.