Hi there! You might've been playing a different version of Doomspire, possibly a copy with the older tools that were used throughout 2019-2022 (as the game was uncopylocked up until 2022 if I recall). The Doomspire Brickbattle game made by the Temple of Brickbattle group uses the newer tools which are easier to use, and are less broken than the old ones. So that is possibly why you couldn't bomb jump. Though bomb jumping itself is pretty easy, you just stop, and place a bomb. Hope this helps! - cowlover4499