No worries re the control issue. Had it before a few refreshes usually fixes it. just wanted to let other players know.
Yes the tiling feature of gdevelop is probably the thing holding it from being a real game engine. I was hoping they would have fixed that before going 3d. Godot and unity have an awesome feature. I am sure it will come soon enough.
I wanted to make a good Metroidvania but was looking for a good tileset/tiling software, so could scale it. I like LDTK, especially their auto tile feature. But like you said still have to manually add barriers. I managed to get through Tiled's tutorial and get their software to work and the collision map. But after spending way too long on figuring out their autotiling feature I couldn't get it to work with the collision map. Still a work in progress.
Yes this one was just done by hand. Faster for me to do it that way.