I love this game A LOT, here are my editor ideas: maybe add text that can displayed by a trigger, a new goal wich is a door, mooooore enemies, maybe bosses!

Don't. The last update was 2017, the game is abandoned. Save yourself the $1.

When i launch the game begin red screen.(( How to fix it?

Just add 4 player spawn ;)

It can be very difficult to keep up with threads here on the forums by myself. To get better assistance and to report bugs I strongly recommend that you join me on the Stick Engine Community Discord: discord.gg/n9SmWbr