Thanks for the positive feedback! I think your suggestion would make the game better, so I've made some changes.
There is now a scoreboard between levels and at the end of games. Between levels, the scoreboard shows the level as well as the base, bonus, and total scores. The scoreboard stays until you press A to start the next level. Between games, the scoreboard announces that the game is over, shows the total score, and waits for the player to press A to start the next game.
I also added a level indicator at the top of the screen so you always know what level you're on.