Hello, this is MARS Electric.
Your design is very goo. It's the most cute logo we think.
About letter, we prefer #6 more than #24.
Could you change
1) Base is #6.
2) Background color is #24's yellow.
3) "mars"->"MARS" letter
4) We want to see the color variations.
5) About looking like face character, make the distance of the eyes is little bit more longer.