A hint if you have trouble with the two-minute flawless medal: Ignore the coins. They account for a lot of needless misses. But overall, a fun and simple game.
Hitboxes are a bit iffy, to the point where it's less about dodging and more about staying completely clear of the enemies. And as many people have said, the upgrade system has some serious issues, in particular with no reset feature. It's a shame, since it's otherwise a decently fun game.
The fact that it's way too easy to accidentally click a button and spend a ruby on something (like to complete something) means I'm never going to consider buying those.
Interesting puzzles. A little on the easy side, but intuitive and somehow not repetitive, despite them all involving pretty much placing the cursor in a specific spot. Simple, when done like this, is good. Also good pacing and atmosphere.
This one was easier than the others, but by the same token, it lacks those puzzles you need a guide, patience, or luck to find out, since they're logical only in the developer's mind. If that. This one makes sense. Even the mix-n-match potions, which was funny and clever.
I don't like shooters where you're forced to take hits due to too large hitbox, and where the hitbox is so inexact. It feels so crude and unskilled. Still, fun game.
"It's a secret to everybody." Finally found the last gem. Well, it wasn't that hard to figure out once I had all but one gem. Actually writing down where each gem I found was helped a lot, and then it was just to cross it off once I actually got it.
The main thing that's lacking is an auto-pause when you move the mouse out of the screen. My most frequent cause of death is because the ship stops moving when that happens. Other than that, a fun game.
This game embodies everything I dislike about tower defence games. Too many waves, no hotkey for sending the next wave, a speed and upgrade system you need to learn completely before even beginning to play, and overall just dull.
You can turn it off in the credits menu (square).