Platformer Toolkit

released on Jun 17, 2022

Platformer Toolkit is an interactive video essay, from the creator of Game Maker’s Toolkit. You’ll get to see, first hand, how platformer characters are designed, as you use the toolkit to change and adjust over 30 variables that drive the hero’s movement. Change Kit’s max speed, jump height, squash and stretch, coyote time, and more - and then play through a sample level with your chosen stats.


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GMTK is a total charlatan and this game proves it. The variables used for the jumping physics are just bad and I hate how he acts like an authority on the subject.

Song Accompaniment

This post-silicon faux introductory approach to platform character programming design, well meaning as it is, obscures information in 2 ways.

1. The toolkit here gameifies entirely around you the player being able to tweak towards a working character slowly through the introduction of new information rather than give you a top down understanding of how a good character looks and plays and working backwards from there. As such the useful part of the information is put at the end rather than at the beginning. I believe this is probably because Mark creates his videos in mind for an audience constantly in burnout so he has to 'slow cook' his observations rather than lead with information. You don't want to risk overstimulating the player with information so you give them 1 thing at a time but the player character themselves is going to feel like shit until you have all the functions to tweak open to you.

2. This corporate silicon mess doesn't feel good no matter what you do, because games are actually more about their visuals and music than they actually are about their 'movement'. As he explains, all the movement is completely up to what style of game you're trying to make, and as such its about the audio visual design. You can't make the character feel good to play when you have a horrible non-progressing mallsoft B-Side trumpet song playing in the background and with the visuals all looking like Paper Mario: Sticker Star put through a smoothie blender. It will always feel like chemotherapy that way. Yes you first start by prototyping the movement with simple pixel art and usually throw the sounds and music in last in these projects at the end, but before you start designing at all you imagine a world you want to externalize, is it a fluffy pillow or an industrial nightmare? You can't make a game with just a base awareness of mechanics and free art assets like this. You need to have an idea of what you want it to look and sound like. It would be remarkably less glamorous but this should have been made with simple pixel NES style limitations, possibly with a black background like how Metroid (1986) or Ice Climbers (1985) looks.

There's a lack of firm data, for example the acceleration and deceleration seem useful but they don't give you frame data of the stop and start points (or even just a second timer). Everything is styled to be interesting but not informative. As an actual toolkit, this is worthless. Like yes the preset for mario is slow, but that's because in mario you run and there isn't a coded run button to oscillate the speed.

Anyway, even if we ignore all that, there's just other functional issues that get in the way. For whatever reason run input information on the controller buffers data so your character always turns with uncontrollably slippery lag after changing inputs. I gave up playing this twice because I didn't realize this was just because of poor coding. The input keyboard controller is the arrow keys and the space button which is also a terrible layout.

This is the part where I'm supposed to say something needlessly snarky about how GMT should stick to making videos or how essayists should stay in their lane. I'm not going to say that. I think information simulation games are great, Balance of the Planet (1990) is an information game and it's one of the most ambitious and informative titles out there. I think Video Essays about Game Design are great, people can have great information without even having a hands on approach with the numbers and coding. Xator has a fantastic video/essay on the Mario bounce, which is relevant here, and from my understanding that's all gathered from historical data and reviews. To his credit, I don't know GMT that well and he seems to make shallow stuff but apparently his Boss Key video inspired one of my favorite levels in a game, the esoteric sky dungeon from Yo! Noid II: Enter the Void (2018).

All I'll say is that good observation comes from thoughtful consideration and research. Not out of being performative or hitting a production deadline, nor by babysitting readers/players with a series of continuous priming statements. Historical comparison or Breaking down a graph goes much further. Even without that, just get to the point, you really don't have to tutorialize the audience constantly. It does help to have a good taste in non-verbal music though because otherwise people will get sick, faze out and click off :3

Pretty interesting idea! Would be nice to see more interactive game design "essays" like this.

Well, to be honest, I was already fine with default controls. I've played plenty of shitty 8-bits platformers with worse controls and had fun mastering them.
It's also kinda backwards to have to change the character to fit the level design instead of the reverse... But yeah, it's about game character control, not level design.

Pela proposta de ser mais um brinquedo pra entender tudo que envolve a programação básica de um platformer, funciona muito bem e com o charme dos vídeos do GMTK. (e eu percebi que não sei se quero fazer um platformer tão cedo)