Wow, kudos for the effort! I actually played a couple of games after submission and considered it impossible... I will update this game to the point I originally envisioned after vacations. Hopefully it will be actually fun and balanced at that point :)
Regarding sound / rhythm. It wasn't intentional. Never played the 2nd HoM&M game (though I am a big fan of the series). Can you perhaps explain in a few more details what you meant with regards to SFX fitting well together? Did the actual rhythm of the sounds remind you of the HoM&M game or just the general "feel" of the sounds? Will be mindful about the music and SFX when I'll be updating the game.