The next element to create are the enemies. They should match the style of the main character.
In this game (the super crate boy style platformer I am aiming for) they should be clearly identifiable as targets and stand out well enough.
A common problem with a lot of ‘coder art’ I have seen is the inconsistency in style. This becomes even more visible when the art for the game is ‘collected’ from across the internet. It’s perfectly alright for game engine testing to use whatever is available as long as you remember to bring it inline and replace the bits that are not matching before publishing the game.
Exporting those three designs to our player size of 48×48 pixels looks like this: