virus-defender-game-tic80-min.lua

a=math b=240 c=138 d=120 e=69 f=0 g=0 h=0 i=.5 j=.2 k=.5
function l()m=d n=e o=0 p=0 q=0 r=0 end
l()
function TIC()t=a.sin(a.rad(f))u=-a.cos(a.rad(f))m=m+o n=n+p q=q+i r=r+j
if btnp(4)then m=d+t*9 n=e+u*9 o=t*2 p=u*2 end
if btn(2)then f=f-4 end
if btn(3)then f=f+4 end
cls()circ(d,e,7,8)print("*",(q-6)%b,(r-4)%c,6,true,2)circ(q%b,r%c,2,6)
if pix(m%b,n%c)==6 then g=g+1 k=k*1.2 i=k*t j=k*u l()end
print("SCORE "..g.." HI "..h,9,0)pix(m%b,n%c,15)line(d,e,d+t*9,e+u*9,15)
if a.abs(q%b-d)<9 and a.abs(r%c-e)<9 then h=g>h and g or h g=0 k=.5 i=.5 j=.2 l()end
end

virus-defender-game-tic80.lua

--[[
    Virus Defender

    An Asteroids-like game in Lua for the TIC-80 fantasy computer console
    Created and submitted as a game jam on Itch.io for TweetJam 4
    in which entries were limited to 560 characters, the amount to fit
    into two Twitter tweets.
    https://jimofleisure.itch.io/virus-defender
    This was made in TIC-80 v0.7 ; in v0.8 the default color palette changed so colors may be off
    The pre-minified code follows
--]]

-- for extra manual minifying
m=math
screenwidth=240
screenheight=138
middlex=120
middley=69

-- starting turrent angle
angle=0

score=0
highscore=0
edx=.5
edy=.2
espeed=.5

function resetmovers()
-- init bullet x, y, dx, and dy (velocity)
    bx=middlex
    by=middley
    dx=0
    dy=0
    -- init enemy
    ex=0
    ey=0
end

resetmovers()

function TIC()
    x=m.sin(m.rad(angle))
    -- negating Y because screen coords
    --   and I want starting position up
    --   and 0 is shorter than 180
    --   only saving 1 char, though
    y=-m.cos(m.rad(angle))
    bx=bx+dx
    by=by+dy
    ex=ex+edx
    ey=ey+edy
    if btnp(4) then
        -- pew pew
        bx=middlex+x*9
        by=middley+y*9
        dx=x*2
        dy=y*2
    end
    if btn(2) then
        angle=angle-4
    end
    if btn(3) then
        angle=angle+4
    end
    cls()
    -- cell
    circ(middlex,middley,7,8)
    -- enemy
    print("*", (ex-6)%screenwidth, (ey-4)%screenheight, 6, true, 2)
    circ(ex%screenwidth,ey%screenheight,2,6)
    -- bullet hit detect
    if pix(bx%screenwidth,by%screenheight) == 6 then
        score = score + 1
        -- -- reset enemy
        espeed=espeed*1.2
        edx=espeed*x
        edy=espeed*y
        resetmovers()
    end
    -- score
    print("SCORE "..score.." HI "..highscore,9,0)
    -- bullet
    pix(bx%screenwidth,by%screenheight,15)
    -- turret
    line(middlex,middley,middlex+x*9,middley+y*9,15)
    if m.abs(ex%screenwidth-middlex)<9 and m.abs(ey%screenheight-middley)<9 then
        -- game over! man. game over!
        highscore = score > highscore and score or highscore
        score=0
        espeed=.5
        edx=.5
        edy=.2
        resetmovers()
    end
end

--[[
Copyright 2020, 2021 Jim "JimOfLeisure" Nelson

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
--]]