I like your idea (indeed, they're all nice) but we want to stay away from cloud because very many rivals are using cloud. The new requirement is as below. I'm looking forward to see your new work under new requirement.
1. Stay AWAY from 'blue' or 'cloud'. 2. Use warm color like BROWN, ORANGE, RED(and also yellow is good if it is used as accent). 3. Emphasize 'powerful' image much more. According to this, the keywords will be 'power', 'energy', 'impression' and 'go up.
So, I think some motif will be. *volcano *beanstalk *the film 'Deep Impact' *Rocket engine But, don't have to stick to these motif, please use your inspiration freely.
#151 is so cool. But I need it look more solid(stereoscopic effect). Just like shadows, gradations or reliefs. And also I want more color variation to make my imagination more confident.