Still Alive

I like the atmosphere ... The gameplay is good ... But it's hard. I tried several approaches: prioritize investment in the search for weapons or in practice ... The search for weapons does not bring good power compared to the mounted level zombies. Gains of practice are not quite "visible" during the game.
In my opinion, it lacks:
A little more distance between the departure of zombies and home.
The headshot that broke the skull and threadbare faster.
A summary at the end of part (statistics. Days. Hitpoint ...)
an upgradable barricade (the search does not give as weapons!)

The trick is to HOLD the fire button instead of press it. Upgrade Practice to 50%, then Weapons to 18%, then practice to 100%, weapons 100% and finally the car to 100%. It takes awhile and gets boring. The waves are too long.

It has no room for error. Thats the problem. And if u loose u have to start all over. What if u loose at 99% of repair. Is it part of the game to start over and over and over again. Like for wining the game u have to play it like 50 times for not mistaking ?

1/5 Useless if its imbalanced by the 6th level. Can't save waves, can't save progress, don't earn currency to start with better stuff. Terrible game.

How to beat this game in 5 easy steps:
-Raise practice up to 50% (50%more stamina) (if you click on icons they stop investing stamina)
-Now search until 18.1% (shotgun)
-Practice again 100% (better aim)
-End search 100%
-Repair, is the only thing you can do now.

By this way i beat this game at 3rd try without taking damage.

Usefull tips:
-Before 100% practice, only 1st shoot at head, the others at body
-Don't waste money on construct, if you take a lot of damage in last wave you will recieve more if you don't get a better weapon.
-Second gun is worse than first.
-Kill first downscreen zombies when they are together, the other will recieve stray bullets.

I hope it was usefull for you and sorry for my english.