As an avowed supporter Cap has liked me the game. Small Schnitzer as the too rapid speech of Cap were already mentioned in the Vorrezensionen. An important tip for defeat of Zola robot to which I am almost in despair, is the one on the platform very, very quick succession, the "A" key must press briefly in a row (Then can one energy beam also set back). This is then still needed three times. I am writing this because it really was not apparent to me - you have to do to defeat Zola. I hope it helps you and I wish you much fun with it.
PS: For Cap fans - you can also two other Cap unlock costumes