I managed to go out of the map and I am not sure if it was intentional. I could re-pickup the crystals but the upgraded equipment was then downgraded. Before that I could not find a way to navigate the EV out of the bottom left corner - It would either be blocked by the crystals because I could not use the light, or go out of range in the upper right. 
Thanks for letting me know. At least one other player discovered this too -- it is not intentional, it is a bug. Sorry about that! I have made a fix and re-uploaded the game, so if you play again you should be able to get to the same spot you were and finish the game in the correct way. You are almost at the end. With the new version you should have a bigger range to be able to figure out the final puzzle. Thanks for letting me know, and sorry again that you ran into the bug. Thanks for playing :)