The moving sponge was replaced by moving grav.
I found out how to do it first(1) you have to click "~" then type "tpt.el.spng.loss=1" then put sponge then type "~" and type "!set vx spng -1" your welcome for the help
The reason you can't make it anymore is because the developers "fixed" it. I think it was better before though :(
to get console you have to press "`" without the quotes
for some reason console does't work for me :(
this is good coz when this was made hardly anyone knew how to do it!!!!