If you are looking for target scores I think these would be reasonable for all skill levels of players. You can maybe increment them by 15-30% for the top players and decrement them by 15-30% for the bottom players.

Centigrade 37 - 60,000
Joker Poker - 80,000
Cyclone - 1,000,000
Bad Cats - Just ditch this game from Pin Golf entirely, it's too random
BK2K - 1,000,000
EATPM - 5,000,000
Diner - 5,000,000
Addams Family - 80,000,000
Black Rose - 15,000,000
Theater of Magic - 400,000,000
ACDC - 50,000,000

Some of these scores might be too high or too low based on how your machines are set up. If the machines are set up to be pretty easy, I would add 10-15% to all of the scores as a baseline. If they are very hard, I would just leave the scores as-is. The average stroke count might be higher but they should still be attainable. If the scores seem low in general to you, keep in mind that it's pretty hard for most players to consistently achieve these scores on ball 1 or 2. I don't think you'll have to worry about having perfect-score ties or anything with the numbers I provided, and hopefully the scores are low enough so that newer players don't get discouraged.

EDIT: I see that you are doing a system where scores are capped at 4 for failing to reach the score within a game. Although this is very beginner friendly, I would actually suggest capping the scores at 7 and allowing a player to play a second game to add to their first game's score if they fail to reach the score within the first 3 balls. This gives you a little more fudge room with the scores as a slightly too hard score will result in 4-6s instead of all 4s. Additionally, it's better for the advanced players as well because it allows for a more fine-grained demonstration of their skills on a game.