That was really fun, and really well polished (except for the tutorial bug)!
:)
I really like how the tougher enemies (that take 2+ hits) bounce the heart back to you.
That seemed like a fair thing to help balance the mechanic of chasing the heart.
Similar to how touching enemies doesn't damage you.
That's nice because you have to get up close to get the heart back.
Well done.
Only thing that bothered me was that the heart would fly off in a direction I didn't expect if I tried to shoot while moving.
I suspect there's something funny with the vector addition, or something; but, otherwise the controls were super smooth - enough that I just developed a habit of pausing very briefly before firing (a split second was enough for the shot to match my intuition again).
I struggled the overcome level 3, but I got there in the end!
