The game is available for free on Android in the Google Play Store. You can find it by inputting 우파루사가. Unfortunately, typing in Wooparoo Saga doesn't work, so if you can't type Korean, you should be able to find it by typing in NHN entertainment. The picture keeps changing, so it's not the same as the one shown here.
If you want to find it online, just go to this link: https://play.google.com/store/apps/details?id=com.nhncorp.SKLOWKAKAO |