I'm not too familiar with Singapore as I've only visited briefly on a layover but the whole corruption and poor infrastructure portrayed in the streets doesn't seem to ring true in not only one of the smallest countries in the world, but one that is also the most developed country in south-east Asia that have rigid rules and laws on social and environmental development.
I think the cheesy dialogue makes sense because from what I understand it's based on a popular children's book series so it definitely fit the intended audience, kids and young teenagers. However, the acting is terrible, especially from Caleb Monk. All he does is suppressing his own laughter, he smiles at the most random moments and it really makes him come off as a major creep from episode 1. The main character (Idan Aedan) is also pretty terrible but definitely not even close as bad.
The props and special effects makeup is really enjoyable and one of the best parts of the show. Love that they are using more traditional means to bring the spirits and monsters to life. Really enjoy that the monsters from many different traditions and cultures are portrayed but it'd be great if they addressed more where they originate from. I also think the story is overall great but I think the poor choice of actors and that sometimes the context gets lost in the rest of plot it takes away so much from the storyline.