The most common reason for "GETTING STUCK" is when putting down a ride like the Log Flume or Sensory Coaster that can be built by yourself.
If both ends of a ride entrance are not linked by track then the game assumes that you are still designing a ride and waits for you to finish constructing it. Until the ride is finished the game will not continue.
If you are playing a level that seems to be stuck then check all the rides that you have built yourself.
Make sure that the ride is moving or that people are using it. If a ride does not seem to be doing anything then check that it forms a complete circuit because until it does the game is waiting for you to finish it.
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