I appreciate your enthusiasm in sharing this, but this really isn't the place to put it. These forums are for discussion of Learn to Fly 3 speedrunning, and having a random MediaFire link in a random forum post probably isn't gonna get much positive attention. If you want to share your fangame (and you should make it clear it is a fangame), the best place to do that would be in the community discord.

What do you mean Caarda? There is an official LTF4!