Control Strategy
The lyrics come down quickly and furiously from the very beginning, so you have to be very fast with your thumb. Swipe from side to side at high speed and catch the lyrics by sideswiping them if you can't get underneath them in time. The result is still the same, and the quick sections will be far easier to beat.
In-Game powerful drones
Watch out for all of the drones that appear. As you go from level to level, more and more powerful drones will begin to appear, so you'll have to stay on point in order to kill them. Shoot a chainsaw at them by letting go of the screen, then tapping it again in order to hit them. Hit them as quickly as possible in order to keep chasing lyrics without having to worry about them killing you.
Multiple difficulty tiers
You have multiple difficulty tiers not only of each stage within a league, but you can play multiple leagues as well, which are unlockable by earning enough stars on each song in the current league that you are in. You can also buy the Rap Star league by spending five dollars in real life money (or whatever the equivalent is in your country).
Rap Bonus
Unlock the Rap Bonus, which can be unlocked by beating Til It's Gone battle 2 in the rap baby mode. This is unique because the songs are ever-changing and are limited edition, which allows for possibly bigger rewards due to the limited-edition nature of the songs.
Control Strategy...