Great atmosphere! Reminds me of being in a JRPG overworld and running into enemy encounters, but in this game I was actually looking forward to the encounters.
Since I see you're going to develop it further, I'd suggest you add more action to the "exploration" part of the game. Once you realize all the enemy encounters are in the grass, and everywhere else is safe, the tension diminishes somewhat. Just a suggestion, though, and great work altogether!