Awesome game, overall I enjoyed it, the look and feel is great, but it felt a bit frustrating when I wanted to turn around, but the slime jumped instead.

So lovely!!!! I loved the art and the game feel of your game! It feels polished and has a lot of small details that brings player attention and engagement like the level complete heart animation. Its easy to learn/hard to master (excellent). The way you worked with the mechanics using only one input worked very well! Its very responsive and really easy to get going! I added to my cool games collection :D its definitively a good game reference. 

This is perfect for the Only one theme, one of the best, very smart use of only one versatile button, the level design is great, too. An d also thanks for the check points :D

I like that you had to stop moving to use your shield. I think it would be better if you could only press space to move the player in one direction and use other mechanics to let it do different things. (For example enabling the shield when you are not running.) Because right now it's often hard to to use the spacebar for multiple things.

Design[4/5] Shielding mechanic was great, but using spacebar for moving, turning and jumping is a hassle at times. It was also unclear from the beginning that you needed to keep running through the enemies to pass them.

Theme[5/5] Only one button.

Originality[3/5] There exist a lot of one button games. Would give more if you used the environment more to jump/switch direction.

Great stuff! You really got everything you could out of that mechanic! 

I thought the sliding enemies were fine because there was an example above though I did die a few times :D

This was excellent. Especially love the art style and sound. It took me forever to realize that the sliding enemies on level 2 only hurt you with your shield up, so that was a little frustrating. But then again I'm an idiot. 5 stars across the board.

Cool game! I really liked how you introduced the mechanics progressively, the learning/difficulty curve is great!

As others have said, the controls are wonky though, since, when you try to jump, the game has to wait to see if you're wanting to do a short press, a hold, or a double press.

I saw on another comment that you noticed this problem halfway through the jam, and hesitated to start over, but I'm glad you didn't because I think you still made some cool dexterity puzzles to go along with the one-button mechanics!

Oh! And I like how your jump doesn't get interrupted by the corner of platforms! The game lets you slide up to put you on top instead! I wonder if you took the idea from Mark's last video about Celeste, but anyway it's great that you took the time to implement it!

I imagine the game would have been quite a lot more frustrating if you didn't, since, after a failed jump on one of those steps, you would have to double tap to turn around, long hold to move away from the step in order to reach it at your jump's peak, double tap again to turn towards the platform, and then tap to jump.

It would have been a chore.

Anyway, thanks for making the game!

Hey, I sent you this review on discord, but just wanted to post this here for others to see. 

The first thing that caught my attention was the art. It looks just like a classic gameboy game. Also, the way the blob transforms into a heart at the end of each level? fucking adorable. I love the art a whole bunch. 

Sound design is great too. it meshed well with the art. I love the little sound it makes whenever he's hit by the bullets. 

gameplay is solid. only one input button worked for this game. the puzzle elements were fun. none were too hard that I couldn't figure them out after just a couple of attempts, so great job on the difficulty curve for that. the entire game was a tutorial for the game so whoever managed to do your level & puzzle design for that deserves a pat on the back and a cookie. all of it is extremely well done and balanced. 

I don't have a whole lot to say but that's only because everything just meshed so well together and your game is so good that I'm just not sure what all to really say about it beyond, this is a goddamn good game. I was actually surprised by how much content it had, considering you had only 48 hours. it feels like it's own full, short, standalone game. you did amazing and you should be very proud, you did amazing.

Appreciated that one button affected multiple platforming elements at once. The sound cut-out after a few deaths, which was sad because I was enjoying it. Liked this game a lot!

Check out our submission, here.

Oh wow, the level design is really well done ! I love how you teach all your mechanism and how they can interact with each other !

Really cool game !

Thought I had some problem with the audio that glitched after a while, but that's okay, this won't affect my rating ;)

Great use of one button to do all the actions a normal platformer does! The control is clever and smooth, but does take some time to get use to. Consistent graphics quality, and nice level design! Good job! :)

Good work, I like the idea and its realisation. Gameplay is smooth and enjoyable, sometimes hard, but I in a good way. I think, the game will be great for streamers.

I really like the fact that I only have to use one button. Visuals and music are simple but fit well to the game. It was pleasant to play :)

A really cool idea and well executed as well. I love all the ideas you had for what you can control with one button only. And especially the idea of giving the player a shield when doing nothing, therefor giving him time to think what to do next. Good job!

You've already mentioned some of the flaws of having a single button with a precise platformer, but you did a good job on capitalizing on some solid level design to test the limits of one-button controls.

I was torn on how much to rate you for design, because the individual levels show some really good combinations of different obstacles, but there are some obvious design flaws in just using a single button. Considering how well you designed the levels in spite of the forced restrictions, I feel that this game needs to be mentioned by GMTK, due to the lessons this game can teach about design. I'm giving full points for design, theme, and original use of the restrictions.

All that said, this was a truly terrible game. I'm glad I'll never have to play it again. You're an amazing level designer to get me to finish something with controls this bad.

Really like the one button interface though moving short spaces can result in jumping which is a bit frustrating (but hey, what are you gonna do?) I love the graphics and the heart shape at the end of the level. Pretty difficult, as most game jam games tend to be. Overall good execution and enjoyable

Really liked the level design and gimmicks, thought you made great use of them in interesting ways. I think that the levels weren't really created to fully embrace the control scheme and some areas would have been better with multiple buttons. Even then I had a lot of fun with this and its definetly well produced and not too difficult.

I think the controls hold the game back a bit as they make the game harder than it should be but over all very creative and interesting, I loved seeing what you could come up with.

Clever single button control scheme, nice gameboyesque style.

My only complaint is it's a bit too hard too quick. Otherwise, very solid entry.