Lotta fun! Nice mech designs, good animations, cool level.
Couple things to take it up a level: it wasn't immediately clear to me I had to target with the mouse, I kinda thought it was just attacking in a random direction. Maybe an arc or arrow that follows the mouse around even when not attacking would give more feedback. And a bunch of times I thought I had just enough room to squeak through but ended up taking damage.
Great job!