Hi beloempoenjanama,
I like you're designs, if you could try using brighter, more vibrant colors like the ones I put in the top 5 that would help a lot. These designs come off as a bit too serious. Also, I'm not liking the symbol as much in #44-47 because I've seen it before. Can you try a different variation on the symbol? I think you're on the right path just some small tweaks will help a lot.
Thanks for your hard work!