Thank you for playing my games. In 8bit wars all levels are be able to finish, of course. I made this game years ago and don´t remember each level. Level 4 is the last one so is is the hardest....
If you have the strategy to get rid of it, I'd be very curious to know it.
I've just spent hours trying to figure it out, but it's beyond me.
I made a little cover for the game you can see here :
https://imgur.com/a/N9b4g3e