this is ... AMAZING!! but ... rly hard (or am I just that bad?)
Anyone got any hints on how to beat levels? I get overwhelmed even at the schack
First, you always can lower the difficulty or use cheat engine if the game is really too much for you.
Without that, game can sometimes require a strategic approach in resource management and tactic. General strategy: at the beginning of the level, you should not spend money on weapons that will become obsolete by the 5th wave, as well as medicines, the loss of health does not mean anything now, later, when you buy buffs, it is advisable to maintain the parameters higher so you not to lose them with any mistake. At each level, there are places in which it is most convenient to be located so that the enemies go to you longer and not from different directions, if you are surprised, you can roll several times to (probably at the cost of part of your health) make a train of enemies and increase the distance, running trough the map. I want to mention, most enemies climb the ages faster than you and could attack you while you are climbing. In the hut, you can shoot half the horde on the left, and later run back and forth and destroy individual zombies and groups. In the caves, on the right there is a very long platform, stand on its left edge and shoot back, flies and large flies will try to fly over the top, giving you time, and jumpers will crash into the low ceiling and slow down. Also, I recommend at first, instead of replenishing ammo, just buy a new gun, it will be full, and any ammo box you pick up will give you one more magazine for each new gun.
Hut. Shoot heads with a pistol, buy a new pistol, buy a passage to the right, when there is about 1750 money in stock, then you can buy a submachine gun in a weapon box, then either save up for a cooler gun ($1500+) or buy buffs (Damage -> accuracy -> rate of fire) and restock ammo - this will last up to wave 25. For large groups it is convenient to use any shotgun except the first one. To get specific achievements: when there is enough money, buy an aphrodisiac and use it right before drinking tea with doggies, it'll make so your lust will stay almost untouched.
Caves. Go through two waves, fix the generator, get a searchlight, and go to the place I mentioned earlier, place the searchlight so that it illuminates the area with enemies, shoot and run in a circle if they break through your defenses. Buy a rifle (a box on the top right), it kills with one hit, especially if it is enhanced with buffs (waves up to 13 should be enough, because enemies will increase their health), then you need something fast-firing, preferably M4 or a shotgun with big magazine, and other buffs. Be careful, worms are constantly crawling on the ground, it is easier to kill them with a cheap submachine gun or just quickly run/roll through them. To get specific achievements, leave one desired enemy per level and let that invite you to tea a couple of times, use the aphrodesiac and repeat the process. Do not kill the last enemy or it'll start a new, you don’t want to slow down for 8 seconds to relieve excess tea from your body while you are surrounded by enemies or skip the time for a purchase break?