Like in this case, using lasso(J) and jump (I) and Dash (L) keys are not optimal for player as they are not habitual to play like that, you can put lasso maybe on left mouse click, dash on right mouse click, and for jump Shift or Space would be fimilliar. As most players are used to play with WASD, Space, CTRL, Shift And Mouse for FPS games or WASD and Space for platformer. And I suggest, find some popular platformer which has more mechanic otherthan only move and jump and see what key binidng they are using.
Or you can try only Arrow keys for movement and left most part of keyboard ( [CTRL, Shift, Z, X, C] or [Q,W,E,R]) and Space key for other abilities/ mechamnics for let player play only with keyboard. which i've found common in most games.