Really really really enjoyed this one. Graphics are great, I love the enemy design and the area, it's simple, yet not flat. And above all I genuinely adored the mechanic. Also got a real Devil Daggers vibe from it. But with drones! And a different dimension!
I have to repeat that I really liked the themed mechanic, and thought it was well executed, including the part where you're forced to stay in the other world until charged, it changes the dynamic of needing to look up the danger, and not really being able to dish any; which; if you stay too long, makes the game a lot harder as well with the multiple spawned enemies.
However, the more I like something, and see the potential in a game, the more critical I get.
The feedback loop of the powerups is not well explained, and it'd be nice if there'd be any kind of feedback on that, seeing it's the most important thing in the game to make any chance of getting to the end.
Sound design could've maybe been touched up a bit to let the player properly know something behind them is firing.
Why does the secondary weapon exist? It's not damaging enough and eats through ammo, once I figured out I should only stick to the shotgun, I actually started winning the game.
Finally, the lack of invincibility frames is unforgivable in a game like this, one can get instantly killed with one small mistake. Why have lives at all at that point?
P.S: I found out that the sword has a secondary ability as well way too late, that made a consequent playthrough flawless.
Also just because: