Very interesting concept, got fun playing this one.
Although I think that the lifes mechanic is unnecessary. Besides that, nice entry!
hmm interesting take having he invincible shields never end. No ship death. Might have pushed things to be seen higher skilled solutions to puzzles required. Used the Shield system to put some time pressure on the player to try their solutions. Kept the recharge time quite quick to avoid waiting around in between.
Appreciate the feedback, will give it some thought :).
Thanks!