Something

B = boost
S = swarm
q = squirt
h = bash
f = frost
p = pellet just do use as a maze, not upgraded

come in from top and from left
_____XXXX_________
|          f
| pppppppp f
| p        f p
| p qqqqBSBf p
| p    hSBS  p
X pqqq  SBS p
X   Bf  BSB p
X   qf  h   p
|    fq   fp
|     Bqqqq
|       B