Press Go to start the speedrun. Click on Scratch Cat's parts and press D to delete them. To win, make it look like amogus (leave only the body and legs intact). If you delete all parts the game also ends but that counts as a loss. Press Replay to play the last replay recorded. Near the top, press save/load to save/load a replay code.
This is a from-scratch rewrite of my amogus speedrun maker project which was originally a remix of an amogus speedrun project: scratch.mit.edu/projects/497737999 Credits to @Meekaryo for that. Example replay. Try to beat this. 121_-98_0_0_121_-98_0_0_117_-96_0_0_100_-73_0_0_54_-13_0_0_39_6_0_0_26_22_0_0_20_29_0_0_20_29_1_0_20_29_0_0_20_29_0_1_16_8_0_0_19_-9_0_0_23_-20_0_0_23_-24_0_0_23_-24_0_0_23_-23_1_0_23_-23_0_1_21_-22_0_0_1_-18_0_0_-23_-18_0_0_-31_-18_0_0_-31_-18_0_0_-31_-18_1_0_-31_-18_0_1_-40_-24_0_0_-40_-31_0_0_-40_-32_0_0_-40_-32_0_0_-43_-35_1_0_-44_-37_0_1_ Also sometimes replays like to desync.