Rushdown Rivals

Description
In Rushdown Rivals you fight multiple opponents familiar as Newgrounds' characters. You can play with either a keyboard or controller and play cooperative with a friend.
In gameplay, each character has 2 sets of attacks, with each individual attack based on the direction the player is moving towards. Each character also has one special ability (sometimes also a passive ability), and a "RUSH" ability activated when the player has comboed multiple hits into enemies without receiving any hits.
The player chooses a map to start in and the mode they want to play (Tutorial, Standard, Standard Insane and Endless), though they should beat Standard mode on any map at least one to unlock other modes (except Tutorial). Enemies come in waves and each set of waves ends with a boss enemy that is significantly stronger and is usually a robotic version of a prominent character on Newgrounds. The enemies and bosses that appear are randomly selected for each playthrough.