So I finished a level with about 5% armor left. The game apparently considers this instant death every time I try to play any level. Only way to fix it was to erase all my progress. Great.
2-10 solution: Move middle right coin to top middle. Move bottom left coin to top left circle. Move left coin in 2nd row to top right. Move top middle coin to empty circle on right. Move last coin to last empty circle.
2-9 solution: (All moves count from left to right) Move 2nd coin to the top right. Move coin in 3rd circle to top right. Move top left coin to 5th circle. Move top coin to 3rd circle. Move 4th circle coin to 2nd circle. Move 3rd coin to empty circle.
I think the best way to start the game is to get the Energy Burst spell under the Mage section. Use that spell for all your fights while you try to unlock the Death spell under the Demonic section. Once you get the Death spell, everything becomes much faster. Also, using the Blood Siphon spell is a great way to heal yourself + damage the enemy.