Another most Epic Battle Fantasy indeed! The stories themselves are excellent and the gameplay just adds to it. You're downright hilarious at times.
These are some of the very best turn-based RPGs on the Internet. The first one was good and you only improved from there. IMO EBF3 and EBF4 have a very different feel and playstyle from EBF and EBF2. I like both playstyles.
One thing I liked about EBF4 (as opposed to EBF3 and EBF2) is you got rid of the skullcats nolegs bonus stages. No offense, but I didn't like that particular bonus game and mastery of it was required in EBF3 to get to the very final area.
One thing I would recommend for future games: Bonus stages are fine, but keep them as just bonus stages. Game progress itself should not depend on mastery of bonus stages.
Also, since you seem to be going in a commercial direction with the latest installment of the EBF series (taking it to Steam), you may want to be careful with using unlicensed characters in your games.
I would recommend against using swastikas in your games. If nothing else, I believe that makes them illegal to play in Germany and that may cost you sales. I think any other symbols are probably fine. I don't remember if this EBF had swastikas but I know some of the others did.