In Battle Bouncers there are a number of different Game Modes available!
The Campaign:
This is the main gameplay mode where you'll progress through the various areas, collecting new heroes, items, runes, etc. Clearing stages in the campaign is how you'll be rewarded with the majority of your items, gold, and heroes.
Heroic Mode:
Heroic mode unlocks after obtaining 100 stars on campaign stages and allows you to replay them on a harder difficulty granting a new set of rewards. Some heroes that are not found in the campaign are attainable through clearing Heroic Mode stages.
Tower Mode:
The Tower is a challenge mode with limited attempts per day that unlocks at player level 10. Each day a new tower will be active for you to tackle. You'll progress through tower stages by completing various objectives while taking advantage of special boosts depending on which tower is active. Tower stages contain rewards such as Skill Scrolls, Diamonds, Tower Tokens, and more!