its the usual wasd if you want press 5 and battle the special sans special sans will increase difficulty and will activate special attacks press r to reset deaths
with world death counter includes the sansister custom blaster that does 100 damage repeatedly with bonigun minigun that shoots out bones there is no gun though sadly any errors should be written in the comments to help improve the game game is one of the three special games the others are undertale brother's https://scratch.mit.edu/projects/154291747/ undertale partner's a battle like no other https://scratch.mit.edu/projects/164236799/ and this one
