responding to playtester data

i've had a few people playtest the game now, and i've taken lessons.

here's what's changed, in both the DOS build and the browser build:

• different icons for different title screen exits
• have to press Up or Enter to use an exit
• switches can now be flipped with Up or Down
• updated ideas to mention new buttons
• Ctrl+Z no longer gets you stuck in a savestate loop when there's multiple players exiting
• tiles can no longer be placed on top of the player
• switches now reset with Ctrl+Z
• you can press Enter to hurry up idea screen texts

it's always useful having an extra pair of eyes, isn't it?