The one arrow that is black surrounded with red is jump boost it gives you plus one jump power. The arrow that is black, surrounded with red with A is auto jump (100). the red button activates ultra jump (out of order) (500000000000)
Shoutout to @MichealFan12315 for the idea Here is the Minecraft trial chambers update on scratch https://scratch.mit.edu/projects/1169844803/fullscreen/