It’s playable yes, but as Joao said you might need text explaining it.
When I pressed Q and E nothing happened, they only seemed to work when the enemy was close.
So maybe if you had them working regardless of the enemy was standing it would be better.
I’m one of those people who doesn’t bother with tutorials or reading the controls unless I run into a problem, before then I just mash keys to see what works, so I thought Q and E weren’t working 
I found out if you dont move then the AI gets stuck walking into the box in front of you.
And I dont know why but the first time I played it the collision didnt work, and I could walk through all of the boxes 
Good start though. Are you expanding on it or just making something that works?