I'm progressing quite well! I have fixed 3 bugs that I didn't know they were till I didn't changed the map ^^
Changes:
-Hero can fall in 16x16 spaces now (small 16x16px areas).
-Map Collision engine recoded. It works MUCH BETTER now.
-Added hero invincibility counter when get damage.
-Fixed Monsters movements.
-Optimized some part of the code.
-Gravity and jump changed.
I'm now using Dualis to test MegaETk. From now on, MegaETk works 100% with it