It's a good game! I like the graphic ambience, which gives it a steampunk feel, and goes well with the fast-paced gameplay. The design of the gun, which flips after each shot, and the clicks really set the tone :)
The atmosphere is less suggestive of the mystery, catacomb and ancient civilization described in the game's descriptions, and more of an abandoned industrial steampunk, but the overall atmosphere remains coherent and convincing! :)
I found it demanding to get to grips with at first, so perhaps the level design could be more progressive to help you get the hang of it. A simple room, a little more in tutorial mode, for example.
Also, in terms of level design, we'd like to be able to go fast and exploit these super abilities to cross quickly and jump several holes at the same time, as in the zigzag part, which allows several passages depending on our choice, which is very interesting gameplay. It would also make it possible to pass through the same rooms differently with the new abilities, with passages accessible only with the upgrades, for example.
I'm wondering whether the labyrinth phase is really suited to the fast-paced, fast-moving gameplay you've chosen. Perhaps concentrating on the essential gameplay, i.e. rushing around in platformer mode and smashing turrets, would reinforce what seems to me to be the strong point of the game's experience.
It was fun to play, thanks for the game! :)