Bugfixes, difficulty adjustment

Based on feedback during the last jam, we reduced the overall difficulty by:

• Making it so that the leprechauns don't always match your jump to catch you
• Making it easier to stun leprechauns (collisionshape adjustments and AI)
• Reducing the touch distance at which leprechauns catch the player

We also fixed a few bugs:

• Getting stuck on the bottom right corner of the level
• Player collision shape incorrect on turning
• Animation speed set too slow