--------/------/------INSTRUCTIONS--------/---------/-- arrow keys and WASD to move, now you can move backward. z to place normal trap. x to place heavy trap.zombies in this edition will be much stronger. there are 4 wave.if you survive to wave 5, you win. if you touch infection zombie, you will lose. wave 4 will be longer than another wave because it's final wave. i spent more than 1 week to make this project so please, love, favourite. thank you so much.please don't use too much trap in wave 1, it will make a bug, i will find ways to fix that bug as soon as possible, sorry. 27/5/2021 V 1.0.6 add Derkel, trap 1/6/2021 V 1.1.2 add normal zombie 2/6/2021 V.1.1.8 add strong zombie, fast zombie 3/6/2021 V 1.4.3 add boss zombie, wave 4/6/2021 V 2.0.0 add all zombie varible 6/6/2021 V 2.1.3 add HP, fix infinite zombie bug 7/6/2021 V 2.5.7 add backdrop 8/6/2021 V 2.6.4 add infection zombie 10/6/2021 V 3.0.0 add more zombie hp 11/6/2021 V 3.3.1 finnally finish!! the amount of trap are limited, although i don't know how many is it.