Bubble pop is a single player game. There are two modes: Relaxed and Competitive.

Relaxed Mode:

You can choose what background art, type of bubble and fall speed you want and let it go. In relaxed mode the only goal is to chill. You don't even need to pop anything, the bubbles will pop themselves at the bottom of the screen.

Competitive Mode:

Race against the clock to pop as many bubbles possible before three bubbles hit the ground. The backdrops are chosen at random, so you won't always play the same order. Compete against others to take your spot on the Top 10 leaderboard for both the Weekly and Daily categories.

Unlockables

In-game Items

Bubble Pop includes a few in-game items: bomb, score multiplier and slow. All can be unlocked via the in-game currency Orbs. 

Orbs

The in-game currency. You earn orbs for every play through in competitive mode. Alternatively, you can purchase them in packs.

Backdrops/Bubbles

There are six different kinds of backdrops and six different style of bubbles at launch with more being added over time.