Description written using part of the text from the game's tutorial levels:
Ultimate Assassin 3 is a fast-paced 1-player game with simple graphics and a straightforward premise.
You are an assassin sent from the future. In every level, your mission is to kill the green guy and escape. There is a time limit based on the difficulty level of the mission and various numbers of randomly moving guards to avoid throughout the level. Once you have killed the target you must make your way to an extraction point to complete the level.