Does this count as beating the game?

Level 19 unlocked, I was going to head to the 5th island (is there a 5th island?), but it directly jumped me to level 50. Is this one of those watch-an-ad-and-you're-done games? Who's gonna grind to level 50 if it's like this! They only give 5 EXP at a time, I'm not playing anymore! This game is lacking in EXP, not money at all. Remember to never upgrade your level count.