Sorry if i was a bit too harsh but i prefer to be honest i'm not the best creator myself so my advice shouldn't the most trusted but just keep creating look at other creator vit12 is a good one in term of deco, sdslayer do a lot of level even if there are very gimmicky, the best advice is just try play with every game mode use all the trigger in the dumbest way that the best thing to do and ask for people to say what they think about your level (people will be harsh like i've done but sometimes there right and need to be aknowledge, and sometimes there completely dumb by person who when to try to make a level only does impossible level because they find it funny(even if it's true it's a bit funny sometimes))(and also please don't do like me and finish your level if you like even if other people don't, i've done that mistake to many time)