Good:

• Really deep platforming mechanic. It takes a while to get used to, but feels so good when you get your head round it.
• Nice, simple 2-bit art style. It's very readable, and looks good.
• Normally, I would hate a game this difficult, but your generous checkpoint system makes it so much more playable. No lives, no fuss, just back to the start of the room. Usually not far back either.

Bad:

• More tutorial would be good. I like how it's not shoved in my face, and you clearly built the second room to teach the drill mechanic, but it was very unclear to me for a long time that I needed to be falling to drill into the ground. I thought some floors were just drill-proof.
• While I like the sound effects, the music/ambience is not very pleasant to listen to.
• It feels like there's a conflict between the one-room camera and the multi-room level design. Sometimes I drill off-screen straight into spikes, that I had no way of knowing about. It's very hard to react in time when the whole room is popping in at once. That's a lot of information to process.

Overall, not the kind of game I usually enjoy, but I had a lot of fun playing it. The fact that you made something so polished in just one week is frankly amazing.

Whew, I'm shaking. I found it frustrating and hard to control, even once I figured out the mechanic. At least I think I figured it out, I was unable to consistently drill upward, jumping and then drilling down seemed to work the most reliably. In the areas after you get the dash there's many places that require very precise timing. I wouldn't have even gotten as far as I did if the game hadn't taken pity on me and occasionally moved the checkpoint past spikes after I died just on the edge. That second room you showed here is where I gave up.

This is a cool idea, there's something really freeing about being able to tunnel straight through, it's almost like swimming, and well developed for a weeklong project. Thanks for submitting it!

This is a neat little game! I like the idea and the burrowing mechanic is well done. But the controls need some work. I could move and jump with the game pad, but it’s not fully supported. I think using a game pad would work better for a lot of players. Using the keyboard as is is just too difficult.

This game is also very hard and gets hard quickly. At least it did for me. And then there’s all the blind falls/deaths. At least the only penalty is that the game starts you over right away close to where last started making a burrow run.

Fun game with responsive controls, enjoyable, buy some rooms may be difficult to figure out

I couldn't get a handle on the drill movement--it doesn't make any sense to me. Is it supposed to have a buoyant force that makes it rise? Because, I hate to break it to you, but that's not how drills work--

This took me 4 hours... I want to scream. 

good game

Dude this is a solid game for a jam. The drill mechanic is new and interesting and the art style is simple but still pleasant to look at, especially the leaves.

Controls feel really nice. The drill mechanic is immensely fun to play with just on its own. It's a bummer that the difficulty of the screens either scaled way too fast for me or I was missing something. I would love to play a version of this with a lot more space to just enjoy the drill for a while before level 7 Celeste (which I haven't played yet, btw, so now I know I have no chance, haha)!

Ingenious concept, nice polish, too hard for my old reflexes xD