Thoroughly enjoyed playing this! It didn't take me long to understand what to do, although a control screen would be nice. I enjoyed playing through the levels and found the bowling ball physics funny. Don't know if there's a level 6 as it stopped working for me then.
I really liked having to predict what the bowlers were going to do beforehand although I feel like there should be more variety in what strategies each bowler can have, especially at the higher levels, as there are 10 throws per level and each bowler seems to have 3 unique animations, 4 or 5 unique ones can easily ramp up the difficulty and make the game more challenging for those that found this game a bit repetitive.