Thanks for the review! It really means a lot.
I am aware of every one of those problems. Truth is, I just didn't have the time to design solutions.
1. Small projectiles: Small so they're easier to dodge, but the sprite's outline was embed in the sprite so scaling it down makes the outline thinner too. Woulda created a shader instead with adjustable borders
2. I hate the shovel (lowers player control when underground--cannot be broken out of early--forgot to add invincibility after leaving) but I couldn't think of anything better to hard-lock the player from beating Frost to create the loop. During my ideation stage I couldn't get creative but had to start working ASAP (I spent 2 full days before writing a single line of code!). In hindsight, a method to "parry" certain projectiles is a far more interesting mechanic.
3. Undodgeable attacks would've been ironed out with more playtesting but I couldn't get to it :( I know Lumi had a few