Good game, but much more can be done
While the game was really great, there were a few complaints I have:
1. I only had 11 guns, 4 melee weapons and 2 types of explosives (17 in total), falling short of the 20+.
2. The last stage was inaccessible (by me, at least). Is there some mechanism required to access it (such as clearing the previous levels in the quickest time possible i.e. no dying)?
3. There's only 1 character? I'd prefer more choices...
4. There are as many as 4 pages of weapons and mercs, but most of the pages are totally blank. Do they also need unlocking?
Other than that, I find it perfect. Hence the 10/10.
Oh, and for the 4th stage, I think I have found the best way to clear it. Simply place 1 barrier vertically outside as far left as possible, and make it such that you and your mercenaries (get the guy with explosives) can just fit between said vertical barrier and a second horizontal barrier (you can try jumping and facing right to be able to get a small time frame where you get to start, or simply switch to a small weapon). Then as soon as the game starts just jump onto the horizontal barrier with a chain saw such that you are just out of reach for the zombies to hit you, but you can hurt them. Switch to guns when you see zombies attacking from the left, falling from the top after an explosion, or when you see any zombies approaching from either side. Then at the end, if there're any zombies left that are stuck, you can easily find them and kill them with the almighty chain saw. It's complicated, but it works best out of all tactics I tried against them.
I'll type more when I find more (if I can).