As you know this game was released in 1995 for Sega Genesis I haven't ever played it until I bought it on Wii virtual console and later on for Sonic's Ultimate Genesis Collection on PS3. Let me tell you that it's worth buying.
You start off in an Aladdin themed game, you play as Ali who has to stop Agito from using his Silver Armlet, he has to travel the land and go gather 4 magical spirit elements, The water spirit, fire spirit, plant spirit, and shadow spirit. They help you throughout the game, water spirit heals your player and douses fires, fire spirit beats up monsters and burns them up, Plant spirit chews through gate bars and eats enemies, shadow spirit helps the player cross over gaps and protects the player from harm.
Ali can use his dagger, sword, bow and arrows and bombs at enemies like in the Legend of Zelda or Secret of Mana games. However the swords, bombs, bow and arrows he carries has limited uses and has to find the unlimited weapons. He can use magical spirits as long as the bar meter doesn't run out. He can collect hearts to increase his HP bar meter and he can collect food to heal his HPs.
You basically run around beating up monsters with your dagger or sword including mosquitoes, snakes, giants, zombies, slimes, rat creatures, druids, knights, raptors and dragons.
I enjoyed the dramatic creepy music played throughout the game, the graphics are amazing. The gameplay is fun though some of the enemies are pushovers. Some levels are hard including racetrack time trial, secret island challenge, some of the boss fights and the 100 level pit marathon which can get difficult and tedious if you're unprepared.
Overall I enjoyed this game I highly recommend this game. Sadly it's no longer available on the Wii virtual console but you can get the Sonic's Ultimate Genesis Collection PS3 or Xbox 360 just for that game Beyond Oasis it's worth your time playing.