Snail stomping

[Zwatotem]

Snail now hides in the shell if he finds himself in danger of stomping. You can however still stomp him with buttjump action. Please test and review.

[Zwatotem]

@busybody42 What are you talking about?

[busybody42]

... Basically, this would probably trivialize the enemy's koopa shell-like gimmick...
It would go flying the instant it's jumped on the first time...
also, wouldn't this be unfair for smalltux players?

[tobbi]

Is this ready to be merged?

[Zwatotem]

I'm looking for someone to create graphic for this PR.

[tobbi]

@Rusty-Box ^^ So you don't get bored!

[Alzter]

Suggestions for snail stomping:

• Normal Snail bounce makes Tux bounce off the Snail's shell, doesn't hurt player
• Buttjump acts like normal stomp
• Make kicking Snail shells not send them flying upwards as it makes has no clear benefit to the player and ends up being frustrating as it can miss enemies and hit you

[busybody42]

Altzer, my reply to your suggestion is that kicking it does make it fly upwards, (but we do need to have a thing that explains that mechanic) but jumping on it doesn't make it go upwards, yet it still skids...

[Zwatotem]

@Alzter: First two points are just, what's applied. Either third point or @busybody42's suggestion (or some variation of it) is considerable.

[Zwatotem]

I'll bring the code to the end and merge with current sprites. They deserve separate PR.