In Spamton's Heart Shooter, you play as Spamton G. Spamton from Deltarune! You shoot hearts (using the left click on your mouse) and move around (move foward using W, A and D rotate your aim!), trying to survive as long as possible! Shoot the hearts on screen, red are worth 50 points and yellow are worth 100 points, and try to survive as long as possible!

There are some possibilities of events occurring, but they can be manually activated too. There are keys on your keyboard that will activate them. As to which ones? Who knows.