Post jam updates

I got some great feedback during the jam. Not satisfied with walking away from this until it feels complete, I've done the following:

• Added a credits screen - It takes a village to raise a child, and I ended up leaning heavily on assets that others made to complete this game. I should have finished the credits screen before the Jam was complete :(
• Added a "How to Play" screen 
• A "skip intro" feature - press any button when PEABRAIN is boring you with his talking, and you'll get right into the game
• All parts can be placed in any slot - if you place it in a slot that is the same shape as your part PEABRAIN gets +2 HP!
• On screen notifications when PEABRAIN gains health
• PEABRAIN's chat box appears over your blocks, so you can actually see what he's saying
• Tweaked the challenge to hopefully make it a bit more exciting