I do like RESHOOT as it is.
That said, a RESHOOT 2 with more lives AND some upgrades/powerups would be sweet too.
And the ability to turn off/on sound effects and/or music to accomodate people trying alternate options for music, while keeping the soundeffects. This would probably be good for all games in general.
What I feel should be said;
The overall product feels well developed. Clear and crisp graphics. Nice movement and "flow". So a SOLID foundation for the future.