Loved the idea, had a lot of fun playing this.
Ideas for future improvement:
- Automatically submitting when you reach the target score and have no unscored balls with effects in play
- "x-2" was completely useless for odd numbers - would be cool if this had a powerful effect attached though
- Larger target areas, since knocking balls out of play is often as useful as putting balls into play and a more even ratio of target/non-target might result in more interesting choices
- Mechanism for choosing how high you want your countdown to go down from
- Perhaps even get rid of the bag entirely and have your entire collection in play at once?