Let the mouse touch the TNT block and press the e key, it will explode cos# = 8 , is TNT block cos# = 10 , is a sensor block, when touched it will activate TNT while it is touching TNT cos# = 12 , When clicked on it, it will change its color cos# = 1,2,3,4,5,6,7 are all normal block cos# = 9 it is bedrock cos# = 11 is a spring block, stand on it and ...... (Just play and you'll know)
nothing........... 1.5: https://scratch.mit.edu/projects/1059257141/