The concepts are really cute, though I think the shading can use some work, particularly on the fat gecko and the lower peel of the banana split.
While I like your art, I find your signature to be overbearing at times. If you really feel the need to put it next to your art, perhaps you could make it a bit more discrete? Just a suggestion! 
Don't worry about it! 
I really like these apart from the banana split which is let down by that shading as the others have mentioned. Great colours as usual!