I tried to make the hurtbox smaller so that you could make riskier maneuver, but is there something else you feel may help? Thanks!
That was probably a good choice to make! However, there are certain areas where the player may try to jump beneath a low ceiling or jump into a one tile-high passage, but they fall short. You should avoid these situations in the level design, and when they do appear, try to be generous. For instance, if a player hits a wall but would have landed on top of it if they were just slightly higher, you could nudge them upward.